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Finding the Fourth Proportional to 39.19, 58.33 and 38.39

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Solution

The fourth proportional to 39.19, 58.33 and 38.39 is: 57.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.19 : 58.33 = 38.39 : x
  2. Step 2: Convert to fraction form
    39.19/58.33 = 38.39/x
  3. Step 3: Cross multiply
    39.19x = 58.33 × 38.39
  4. Step 4: Simplify right side
    39.19x = 2,239.29
  5. Step 5: Solve for x
    x = 2,239.29/39.19
  6. Step 6: Final answer
    x = 57.14

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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.