Finding the Fourth Proportional to 665,760,728.38, 917,997,960.37 and 497,959,227.71
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Solution
The fourth proportional to 665,760,728.38, 917,997,960.37 and 497,959,227.71 is: 686,621,387.99
Step by Step Solution
- Step 1: Write the proportion equation
665,760,728.38 : 917,997,960.37 = 497,959,227.71 : x - Step 2: Convert to fraction form
665,760,728.38/917,997,960.37 = 497,959,227.71/x - Step 3: Cross multiply
665,760,728.38x = 917,997,960.37 × 497,959,227.71 - Step 4: Simplify right side
665,760,728.38x = 457,125,555,387,495,360 - Step 5: Solve for x
x = 457,125,555,387,495,360/665,760,728.38 - Step 6: Final answer
x = 686,621,387.99
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.