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Finding the Fourth Proportional to 667,079.28, 920,569.59 and 361,155.60

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Solution

The fourth proportional to 667,079.28, 920,569.59 and 361,155.60 is: 498,394.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,079.28 : 920,569.59 = 361,155.60 : x
  2. Step 2: Convert to fraction form
    667,079.28/920,569.59 = 361,155.60/x
  3. Step 3: Cross multiply
    667,079.28x = 920,569.59 × 361,155.60
  4. Step 4: Simplify right side
    667,079.28x = 332,468,862,618.20
  5. Step 5: Solve for x
    x = 332,468,862,618.20/667,079.28
  6. Step 6: Final answer
    x = 498,394.83

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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.