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Finding the Fourth Proportional to 39.53, 58.88 and 39.30

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Solution

The fourth proportional to 39.53, 58.88 and 39.30 is: 58.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.53 : 58.88 = 39.30 : x
  2. Step 2: Convert to fraction form
    39.53/58.88 = 39.30/x
  3. Step 3: Cross multiply
    39.53x = 58.88 × 39.30
  4. Step 4: Simplify right side
    39.53x = 2,313.79
  5. Step 5: Solve for x
    x = 2,313.79/39.53
  6. Step 6: Final answer
    x = 58.53

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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.