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Finding the Fourth Proportional to 58, 87.47 and 54.76

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Solution

The fourth proportional to 58, 87.47 and 54.76 is: 82.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    58 : 87.47 = 54.76 : x
  2. Step 2: Convert to fraction form
    58/87.47 = 54.76/x
  3. Step 3: Cross multiply
    58x = 87.47 × 54.76
  4. Step 4: Simplify right side
    58x = 4,789.86
  5. Step 5: Solve for x
    x = 4,789.86/58
  6. Step 6: Final answer
    x = 82.58

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.