Finding the Fourth Proportional to 515,564,568.36, 711,539,687.97 and 289,540,697.58
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Solution
The fourth proportional to 515,564,568.36, 711,539,687.97 and 289,540,697.58 is: 399,600,186.39
Step by Step Solution
- Step 1: Write the proportion equation
515,564,568.36 : 711,539,687.97 = 289,540,697.58 : x - Step 2: Convert to fraction form
515,564,568.36/711,539,687.97 = 289,540,697.58/x - Step 3: Cross multiply
515,564,568.36x = 711,539,687.97 × 289,540,697.58 - Step 4: Simplify right side
515,564,568.36x = 206,019,697,610,689,344 - Step 5: Solve for x
x = 206,019,697,610,689,344/515,564,568.36 - Step 6: Final answer
x = 399,600,186.39
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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.