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Finding the Fourth Proportional to 1,134.70, 1,565.79 and 637.30

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Solution

The fourth proportional to 1,134.70, 1,565.79 and 637.30 is: 879.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,134.70 : 1,565.79 = 637.30 : x
  2. Step 2: Convert to fraction form
    1,134.70/1,565.79 = 637.30/x
  3. Step 3: Cross multiply
    1,134.70x = 1,565.79 × 637.30
  4. Step 4: Simplify right side
    1,134.70x = 997,877.97
  5. Step 5: Solve for x
    x = 997,877.97/1,134.70
  6. Step 6: Final answer
    x = 879.42

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1.5x scale

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.