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Finding the Fourth Proportional to 39.88, 59.36 and 39.75

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Solution

The fourth proportional to 39.88, 59.36 and 39.75 is: 59.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.88 : 59.36 = 39.75 : x
  2. Step 2: Convert to fraction form
    39.88/59.36 = 39.75/x
  3. Step 3: Cross multiply
    39.88x = 59.36 × 39.75
  4. Step 4: Simplify right side
    39.88x = 2,359.56
  5. Step 5: Solve for x
    x = 2,359.56/39.88
  6. Step 6: Final answer
    x = 59.17

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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.