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Finding the Fourth Proportional to 325,297.20, 487,715.40 and 125,540.40

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Solution

The fourth proportional to 325,297.20, 487,715.40 and 125,540.40 is: 188,221.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,297.20 : 487,715.40 = 125,540.40 : x
  2. Step 2: Convert to fraction form
    325,297.20/487,715.40 = 125,540.40/x
  3. Step 3: Cross multiply
    325,297.20x = 487,715.40 × 125,540.40
  4. Step 4: Simplify right side
    325,297.20x = 61,227,986,402.16
  5. Step 5: Solve for x
    x = 61,227,986,402.16/325,297.20
  6. Step 6: Final answer
    x = 188,221.68

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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.