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Finding the Fourth Proportional to 711,343.59, 981,641.75 and 389,046.62

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Solution

The fourth proportional to 711,343.59, 981,641.75 and 389,046.62 is: 536,877.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,343.59 : 981,641.75 = 389,046.62 : x
  2. Step 2: Convert to fraction form
    711,343.59/981,641.75 = 389,046.62/x
  3. Step 3: Cross multiply
    711,343.59x = 981,641.75 × 389,046.62
  4. Step 4: Simplify right side
    711,343.59x = 381,904,398,034.94
  5. Step 5: Solve for x
    x = 381,904,398,034.94/711,343.59
  6. Step 6: Final answer
    x = 536,877.54

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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.