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Finding the Fourth Proportional to 325.03, 487.38 and 139.93

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Solution

The fourth proportional to 325.03, 487.38 and 139.93 is: 209.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.03 : 487.38 = 139.93 : x
  2. Step 2: Convert to fraction form
    325.03/487.38 = 139.93/x
  3. Step 3: Cross multiply
    325.03x = 487.38 × 139.93
  4. Step 4: Simplify right side
    325.03x = 68,199.08
  5. Step 5: Solve for x
    x = 68,199.08/325.03
  6. Step 6: Final answer
    x = 209.82

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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.