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Finding the Fourth Proportional to 43.02, 59.37 and 38.90

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Solution

The fourth proportional to 43.02, 59.37 and 38.90 is: 53.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.02 : 59.37 = 38.90 : x
  2. Step 2: Convert to fraction form
    43.02/59.37 = 38.90/x
  3. Step 3: Cross multiply
    43.02x = 59.37 × 38.90
  4. Step 4: Simplify right side
    43.02x = 2,309.49
  5. Step 5: Solve for x
    x = 2,309.49/43.02
  6. Step 6: Final answer
    x = 53.68

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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.