Finding the Fourth Proportional to 687,731,406.80, 1,031,597,110.20 and 647,387,445.20
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Solution
The fourth proportional to 687,731,406.80, 1,031,597,110.20 and 647,387,445.20 is: 971,081,167.80
Step by Step Solution
- Step 1: Write the proportion equation
687,731,406.80 : 1,031,597,110.20 = 647,387,445.20 : x - Step 2: Convert to fraction form
687,731,406.80/1,031,597,110.20 = 647,387,445.20/x - Step 3: Cross multiply
687,731,406.80x = 1,031,597,110.20 × 647,387,445.20 - Step 4: Simplify right side
687,731,406.80x = 667,843,017,648,080,896 - Step 5: Solve for x
x = 667,843,017,648,080,896/687,731,406.80 - Step 6: Final answer
x = 971,081,167.80
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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.