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Finding the Fourth Proportional to 57.52, 86.28 and 19.01

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Solution

The fourth proportional to 57.52, 86.28 and 19.01 is: 28.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.52 : 86.28 = 19.01 : x
  2. Step 2: Convert to fraction form
    57.52/86.28 = 19.01/x
  3. Step 3: Cross multiply
    57.52x = 86.28 × 19.01
  4. Step 4: Simplify right side
    57.52x = 1,639.75
  5. Step 5: Solve for x
    x = 1,639.75/57.52
  6. Step 6: Final answer
    x = 28.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.