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Finding the Fourth Proportional to 58.35, 80.44 and 39.92

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Solution

The fourth proportional to 58.35, 80.44 and 39.92 is: 55.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.35 : 80.44 = 39.92 : x
  2. Step 2: Convert to fraction form
    58.35/80.44 = 39.92/x
  3. Step 3: Cross multiply
    58.35x = 80.44 × 39.92
  4. Step 4: Simplify right side
    58.35x = 3,211.16
  5. Step 5: Solve for x
    x = 3,211.16/58.35
  6. Step 6: Final answer
    x = 55.03

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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.