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Finding the Fourth Proportional to 58.31, 80.47 and 33.42

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Solution

The fourth proportional to 58.31, 80.47 and 33.42 is: 46.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.31 : 80.47 = 33.42 : x
  2. Step 2: Convert to fraction form
    58.31/80.47 = 33.42/x
  3. Step 3: Cross multiply
    58.31x = 80.47 × 33.42
  4. Step 4: Simplify right side
    58.31x = 2,688.91
  5. Step 5: Solve for x
    x = 2,688.91/58.31
  6. Step 6: Final answer
    x = 46.11

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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.