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Finding the Fourth Proportional to 39.61, 59.69 and 39.28

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Solution

The fourth proportional to 39.61, 59.69 and 39.28 is: 59.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.61 : 59.69 = 39.28 : x
  2. Step 2: Convert to fraction form
    39.61/59.69 = 39.28/x
  3. Step 3: Cross multiply
    39.61x = 59.69 × 39.28
  4. Step 4: Simplify right side
    39.61x = 2,344.53
  5. Step 5: Solve for x
    x = 2,344.53/39.61
  6. Step 6: Final answer
    x = 59.19

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.