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Finding the Fourth Proportional to 479,540.53, 719,304.49 and 137,992.87

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Solution

The fourth proportional to 479,540.53, 719,304.49 and 137,992.87 is: 206,987.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,540.53 : 719,304.49 = 137,992.87 : x
  2. Step 2: Convert to fraction form
    479,540.53/719,304.49 = 137,992.87/x
  3. Step 3: Cross multiply
    479,540.53x = 719,304.49 × 137,992.87
  4. Step 4: Simplify right side
    479,540.53x = 99,258,890,978.99
  5. Step 5: Solve for x
    x = 99,258,890,978.99/479,540.53
  6. Step 6: Final answer
    x = 206,987.49

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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.