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Finding the Fourth Proportional to 393,957.90, 587,189.27 and 371,535.66

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Solution

The fourth proportional to 393,957.90, 587,189.27 and 371,535.66 is: 553,769.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,957.90 : 587,189.27 = 371,535.66 : x
  2. Step 2: Convert to fraction form
    393,957.90/587,189.27 = 371,535.66/x
  3. Step 3: Cross multiply
    393,957.90x = 587,189.27 × 371,535.66
  4. Step 4: Simplify right side
    393,957.90x = 218,161,753,903.21
  5. Step 5: Solve for x
    x = 218,161,753,903.21/393,957.90
  6. Step 6: Final answer
    x = 553,769.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.