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Finding the Fourth Proportional to 39.29, 58.19 and 38.89

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Solution

The fourth proportional to 39.29, 58.19 and 38.89 is: 57.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.29 : 58.19 = 38.89 : x
  2. Step 2: Convert to fraction form
    39.29/58.19 = 38.89/x
  3. Step 3: Cross multiply
    39.29x = 58.19 × 38.89
  4. Step 4: Simplify right side
    39.29x = 2,263.01
  5. Step 5: Solve for x
    x = 2,263.01/39.29
  6. Step 6: Final answer
    x = 57.60

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.