Finding the Fourth Proportional to 855,479,915.20, 1,283,219,872.80 and 310,239,236.80
Calculator
Solution
The fourth proportional to 855,479,915.20, 1,283,219,872.80 and 310,239,236.80 is: 465,358,855.20
Step by Step Solution
- Step 1: Write the proportion equation
855,479,915.20 : 1,283,219,872.80 = 310,239,236.80 : x - Step 2: Convert to fraction form
855,479,915.20/1,283,219,872.80 = 310,239,236.80/x - Step 3: Cross multiply
855,479,915.20x = 1,283,219,872.80 × 310,239,236.80 - Step 4: Simplify right side
855,479,915.20x = 398,105,153,984,065,088 - Step 5: Solve for x
x = 398,105,153,984,065,088/855,479,915.20 - Step 6: Final answer
x = 465,358,855.20
Related Problems
Find fourth proportional to 427,739,957.60, 641,609,936.40 and 155,119,618.40
Half scale
Find fourth proportional to 1,710,959,830.40, 2,566,439,745.60 and 620,478,473.60
Double scale
Find fourth proportional to 855,479,916.20, 1,283,219,874.30 and 310,239,237.80
Similar ratio
Find fourth proportional to 1,283,219,872.80, 1,924,829,809.20 and 465,358,855.20
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.