Finding the Fourth Proportional to 687,720,165.40, 1,031,580,248.10 and 624,230,680.60
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Solution
The fourth proportional to 687,720,165.40, 1,031,580,248.10 and 624,230,680.60 is: 936,346,020.90
Step by Step Solution
- Step 1: Write the proportion equation
687,720,165.40 : 1,031,580,248.10 = 624,230,680.60 : x - Step 2: Convert to fraction form
687,720,165.40/1,031,580,248.10 = 624,230,680.60/x - Step 3: Cross multiply
687,720,165.40x = 1,031,580,248.10 × 624,230,680.60 - Step 4: Simplify right side
687,720,165.40x = 643,944,040,364,979,840 - Step 5: Solve for x
x = 643,944,040,364,979,840/687,720,165.40 - Step 6: Final answer
x = 936,346,020.90
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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.