Finding the Fourth Proportional to 522,988,349.69, 721,774,901.06 and 390,599,504.47
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Solution
The fourth proportional to 522,988,349.69, 721,774,901.06 and 390,599,504.47 is: 539,065,389.99
Step by Step Solution
- Step 1: Write the proportion equation
522,988,349.69 : 721,774,901.06 = 390,599,504.47 : x - Step 2: Convert to fraction form
522,988,349.69/721,774,901.06 = 390,599,504.47/x - Step 3: Cross multiply
522,988,349.69x = 721,774,901.06 × 390,599,504.47 - Step 4: Simplify right side
522,988,349.69x = 281,924,918,689,161,792 - Step 5: Solve for x
x = 281,924,918,689,161,792/522,988,349.69 - Step 6: Final answer
x = 539,065,389.99
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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.