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Finding the Fourth Proportional to 42.99, 59.21 and 38.38

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Solution

The fourth proportional to 42.99, 59.21 and 38.38 is: 52.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.99 : 59.21 = 38.38 : x
  2. Step 2: Convert to fraction form
    42.99/59.21 = 38.38/x
  3. Step 3: Cross multiply
    42.99x = 59.21 × 38.38
  4. Step 4: Simplify right side
    42.99x = 2,272.48
  5. Step 5: Solve for x
    x = 2,272.48/42.99
  6. Step 6: Final answer
    x = 52.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.