Finding the Fourth Proportional to 1,328,869,122.20, 1,993,303,683.30 and 638,609,931.80
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Solution
The fourth proportional to 1,328,869,122.20, 1,993,303,683.30 and 638,609,931.80 is: 957,914,897.70
Step by Step Solution
- Step 1: Write the proportion equation
1,328,869,122.20 : 1,993,303,683.30 = 638,609,931.80 : x - Step 2: Convert to fraction form
1,328,869,122.20/1,993,303,683.30 = 638,609,931.80/x - Step 3: Cross multiply
1,328,869,122.20x = 1,993,303,683.30 × 638,609,931.80 - Step 4: Simplify right side
1,328,869,122.20x = 1,272,943,529,248,901,632 - Step 5: Solve for x
x = 1,272,943,529,248,901,632/1,328,869,122.20 - Step 6: Final answer
x = 957,914,897.70
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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.