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Finding the Fourth Proportional to 58.82, 80.96 and 57.30

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Solution

The fourth proportional to 58.82, 80.96 and 57.30 is: 78.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.82 : 80.96 = 57.30 : x
  2. Step 2: Convert to fraction form
    58.82/80.96 = 57.30/x
  3. Step 3: Cross multiply
    58.82x = 80.96 × 57.30
  4. Step 4: Simplify right side
    58.82x = 4,639.01
  5. Step 5: Solve for x
    x = 4,639.01/58.82
  6. Step 6: Final answer
    x = 78.87

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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.