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Finding the Fourth Proportional to 39.26, 58.59 and 37.78

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Solution

The fourth proportional to 39.26, 58.59 and 37.78 is: 56.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.26 : 58.59 = 37.78 : x
  2. Step 2: Convert to fraction form
    39.26/58.59 = 37.78/x
  3. Step 3: Cross multiply
    39.26x = 58.59 × 37.78
  4. Step 4: Simplify right side
    39.26x = 2,213.53
  5. Step 5: Solve for x
    x = 2,213.53/39.26
  6. Step 6: Final answer
    x = 56.38

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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.