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Finding the Fourth Proportional to 1,134.30, 1,565.50 and 636.98

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Solution

The fourth proportional to 1,134.30, 1,565.50 and 636.98 is: 879.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,134.30 : 1,565.50 = 636.98 : x
  2. Step 2: Convert to fraction form
    1,134.30/1,565.50 = 636.98/x
  3. Step 3: Cross multiply
    1,134.30x = 1,565.50 × 636.98
  4. Step 4: Simplify right side
    1,134.30x = 997,194.51
  5. Step 5: Solve for x
    x = 997,194.51/1,134.30
  6. Step 6: Final answer
    x = 879.13

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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.