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Finding the Fourth Proportional to 39.56, 59.40 and 39.02

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Solution

The fourth proportional to 39.56, 59.40 and 39.02 is: 58.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.56 : 59.40 = 39.02 : x
  2. Step 2: Convert to fraction form
    39.56/59.40 = 39.02/x
  3. Step 3: Cross multiply
    39.56x = 59.40 × 39.02
  4. Step 4: Simplify right side
    39.56x = 2,317.49
  5. Step 5: Solve for x
    x = 2,317.49/39.56
  6. Step 6: Final answer
    x = 58.59

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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.