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Finding the Fourth Proportional to 39.07, 58.28 and 38.35

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Solution

The fourth proportional to 39.07, 58.28 and 38.35 is: 57.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.07 : 58.28 = 38.35 : x
  2. Step 2: Convert to fraction form
    39.07/58.28 = 38.35/x
  3. Step 3: Cross multiply
    39.07x = 58.28 × 38.35
  4. Step 4: Simplify right side
    39.07x = 2,235.04
  5. Step 5: Solve for x
    x = 2,235.04/39.07
  6. Step 6: Final answer
    x = 57.21

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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.