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Finding the Fourth Proportional to 39.45, 58.71 and 39.32

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Solution

The fourth proportional to 39.45, 58.71 and 39.32 is: 58.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.45 : 58.71 = 39.32 : x
  2. Step 2: Convert to fraction form
    39.45/58.71 = 39.32/x
  3. Step 3: Cross multiply
    39.45x = 58.71 × 39.32
  4. Step 4: Simplify right side
    39.45x = 2,308.33
  5. Step 5: Solve for x
    x = 2,308.33/39.45
  6. Step 6: Final answer
    x = 58.51

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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.