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Finding the Fourth Proportional to 39.02, 58.45 and 26.20

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Solution

The fourth proportional to 39.02, 58.45 and 26.20 is: 39.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.02 : 58.45 = 26.20 : x
  2. Step 2: Convert to fraction form
    39.02/58.45 = 26.20/x
  3. Step 3: Cross multiply
    39.02x = 58.45 × 26.20
  4. Step 4: Simplify right side
    39.02x = 1,531.39
  5. Step 5: Solve for x
    x = 1,531.39/39.02
  6. Step 6: Final answer
    x = 39.25

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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.