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Finding the Fourth Proportional to 58.44, 86.91 and 57.29

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Solution

The fourth proportional to 58.44, 86.91 and 57.29 is: 85.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.44 : 86.91 = 57.29 : x
  2. Step 2: Convert to fraction form
    58.44/86.91 = 57.29/x
  3. Step 3: Cross multiply
    58.44x = 86.91 × 57.29
  4. Step 4: Simplify right side
    58.44x = 4,978.73
  5. Step 5: Solve for x
    x = 4,978.73/58.44
  6. Step 6: Final answer
    x = 85.20

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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.