Finding the Fourth Proportional to 915,505,687.68, 1,263,404,421.36 and 497,814,979.92
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Solution
The fourth proportional to 915,505,687.68, 1,263,404,421.36 and 497,814,979.92 is: 686,988,246.07
Step by Step Solution
- Step 1: Write the proportion equation
915,505,687.68 : 1,263,404,421.36 = 497,814,979.92 : x - Step 2: Convert to fraction form
915,505,687.68/1,263,404,421.36 = 497,814,979.92/x - Step 3: Cross multiply
915,505,687.68x = 1,263,404,421.36 × 497,814,979.92 - Step 4: Simplify right side
915,505,687.68x = 628,941,646,650,167,552 - Step 5: Solve for x
x = 628,941,646,650,167,552/915,505,687.68 - Step 6: Final answer
x = 686,988,246.07
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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.