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Finding the Fourth Proportional to 417,972.71, 576,978.95 and 282,190.61

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Solution

The fourth proportional to 417,972.71, 576,978.95 and 282,190.61 is: 389,542.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,972.71 : 576,978.95 = 282,190.61 : x
  2. Step 2: Convert to fraction form
    417,972.71/576,978.95 = 282,190.61/x
  3. Step 3: Cross multiply
    417,972.71x = 576,978.95 × 282,190.61
  4. Step 4: Simplify right side
    417,972.71x = 162,818,041,857.66
  5. Step 5: Solve for x
    x = 162,818,041,857.66/417,972.71
  6. Step 6: Final answer
    x = 389,542.28

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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.