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Finding the Fourth Proportional to 58.97, 87.86 and 57.40

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Solution

The fourth proportional to 58.97, 87.86 and 57.40 is: 85.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.97 : 87.86 = 57.40 : x
  2. Step 2: Convert to fraction form
    58.97/87.86 = 57.40/x
  3. Step 3: Cross multiply
    58.97x = 87.86 × 57.40
  4. Step 4: Simplify right side
    58.97x = 5,043.16
  5. Step 5: Solve for x
    x = 5,043.16/58.97
  6. Step 6: Final answer
    x = 85.52

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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.