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Finding the Fourth Proportional to 39.76, 59.70 and 39.48

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Solution

The fourth proportional to 39.76, 59.70 and 39.48 is: 59.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.76 : 59.70 = 39.48 : x
  2. Step 2: Convert to fraction form
    39.76/59.70 = 39.48/x
  3. Step 3: Cross multiply
    39.76x = 59.70 × 39.48
  4. Step 4: Simplify right side
    39.76x = 2,356.96
  5. Step 5: Solve for x
    x = 2,356.96/39.76
  6. Step 6: Final answer
    x = 59.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.