Finding the Fourth Proportional to 858,683.20, 1,288,024.80 and 218,985.70
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Solution
The fourth proportional to 858,683.20, 1,288,024.80 and 218,985.70 is: 328,478.55
Step by Step Solution
- Step 1: Write the proportion equation
858,683.20 : 1,288,024.80 = 218,985.70 : x - Step 2: Convert to fraction form
858,683.20/1,288,024.80 = 218,985.70/x - Step 3: Cross multiply
858,683.20x = 1,288,024.80 × 218,985.70 - Step 4: Simplify right side
858,683.20x = 282,059,012,445.36 - Step 5: Solve for x
x = 282,059,012,445.36/858,683.20 - Step 6: Final answer
x = 328,478.55
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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.