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Finding the Fourth Proportional to 58.91, 87.78 and 56.97

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Solution

The fourth proportional to 58.91, 87.78 and 56.97 is: 84.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.91 : 87.78 = 56.97 : x
  2. Step 2: Convert to fraction form
    58.91/87.78 = 56.97/x
  3. Step 3: Cross multiply
    58.91x = 87.78 × 56.97
  4. Step 4: Simplify right side
    58.91x = 5,000.83
  5. Step 5: Solve for x
    x = 5,000.83/58.91
  6. Step 6: Final answer
    x = 84.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.