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Finding the Fourth Proportional to 538.52, 807.86 and 191.87

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Solution

The fourth proportional to 538.52, 807.86 and 191.87 is: 287.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.52 : 807.86 = 191.87 : x
  2. Step 2: Convert to fraction form
    538.52/807.86 = 191.87/x
  3. Step 3: Cross multiply
    538.52x = 807.86 × 191.87
  4. Step 4: Simplify right side
    538.52x = 154,999.10
  5. Step 5: Solve for x
    x = 154,999.10/538.52
  6. Step 6: Final answer
    x = 287.83

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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.