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Finding the Fourth Proportional to 457,535.52, 686,768.16 and 221,077.20

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Solution

The fourth proportional to 457,535.52, 686,768.16 and 221,077.20 is: 331,840.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,535.52 : 686,768.16 = 221,077.20 : x
  2. Step 2: Convert to fraction form
    457,535.52/686,768.16 = 221,077.20/x
  3. Step 3: Cross multiply
    457,535.52x = 686,768.16 × 221,077.20
  4. Step 4: Simplify right side
    457,535.52x = 151,828,781,861.95
  5. Step 5: Solve for x
    x = 151,828,781,861.95/457,535.52
  6. Step 6: Final answer
    x = 331,840.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.