Finding the Fourth Proportional to 657,531,927.48, 907,400,728.62 and 396,721,155
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Solution
The fourth proportional to 657,531,927.48, 907,400,728.62 and 396,721,155 is: 547,479,217.45
Step by Step Solution
- Step 1: Write the proportion equation
657,531,927.48 : 907,400,728.62 = 396,721,155 : x - Step 2: Convert to fraction form
657,531,927.48/907,400,728.62 = 396,721,155/x - Step 3: Cross multiply
657,531,927.48x = 907,400,728.62 × 396,721,155 - Step 4: Simplify right side
657,531,927.48x = 359,985,065,105,967,936 - Step 5: Solve for x
x = 359,985,065,105,967,936/657,531,927.48 - Step 6: Final answer
x = 547,479,217.45
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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.