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Finding the Fourth Proportional to 58.11, 80.30 and 42.59

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Solution

The fourth proportional to 58.11, 80.30 and 42.59 is: 58.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.11 : 80.30 = 42.59 : x
  2. Step 2: Convert to fraction form
    58.11/80.30 = 42.59/x
  3. Step 3: Cross multiply
    58.11x = 80.30 × 42.59
  4. Step 4: Simplify right side
    58.11x = 3,419.68
  5. Step 5: Solve for x
    x = 3,419.68/58.11
  6. Step 6: Final answer
    x = 58.85

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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.