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Finding the Fourth Proportional to 1,134.24, 1,565.31 and 636.86

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Solution

The fourth proportional to 1,134.24, 1,565.31 and 636.86 is: 878.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,134.24 : 1,565.31 = 636.86 : x
  2. Step 2: Convert to fraction form
    1,134.24/1,565.31 = 636.86/x
  3. Step 3: Cross multiply
    1,134.24x = 1,565.31 × 636.86
  4. Step 4: Simplify right side
    1,134.24x = 996,886.05
  5. Step 5: Solve for x
    x = 996,886.05/1,134.24
  6. Step 6: Final answer
    x = 878.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.