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Finding the Fourth Proportional to 639,817.92, 960,023.61 and 279,941.33

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Solution

The fourth proportional to 639,817.92, 960,023.61 and 279,941.33 is: 420,041.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,817.92 : 960,023.61 = 279,941.33 : x
  2. Step 2: Convert to fraction form
    639,817.92/960,023.61 = 279,941.33/x
  3. Step 3: Cross multiply
    639,817.92x = 960,023.61 × 279,941.33
  4. Step 4: Simplify right side
    639,817.92x = 268,750,288,614.86
  5. Step 5: Solve for x
    x = 268,750,288,614.86/639,817.92
  6. Step 6: Final answer
    x = 420,041.83

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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.