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Finding the Fourth Proportional to 39.26, 58.52 and 38.70

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Solution

The fourth proportional to 39.26, 58.52 and 38.70 is: 57.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.26 : 58.52 = 38.70 : x
  2. Step 2: Convert to fraction form
    39.26/58.52 = 38.70/x
  3. Step 3: Cross multiply
    39.26x = 58.52 × 38.70
  4. Step 4: Simplify right side
    39.26x = 2,264.82
  5. Step 5: Solve for x
    x = 2,264.82/39.26
  6. Step 6: Final answer
    x = 57.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.