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Finding the Fourth Proportional to 325,229.81, 487,829.66 and 85,337.78

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Solution

The fourth proportional to 325,229.81, 487,829.66 and 85,337.78 is: 128,002.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,229.81 : 487,829.66 = 85,337.78 : x
  2. Step 2: Convert to fraction form
    325,229.81/487,829.66 = 85,337.78/x
  3. Step 3: Cross multiply
    325,229.81x = 487,829.66 × 85,337.78
  4. Step 4: Simplify right side
    325,229.81x = 41,630,300,202.55
  5. Step 5: Solve for x
    x = 41,630,300,202.55/325,229.81
  6. Step 6: Final answer
    x = 128,002.72

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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.