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Finding the Fourth Proportional to 1,131.04, 1,695.28 and 644.52

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Solution

The fourth proportional to 1,131.04, 1,695.28 and 644.52 is: 966.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.04 : 1,695.28 = 644.52 : x
  2. Step 2: Convert to fraction form
    1,131.04/1,695.28 = 644.52/x
  3. Step 3: Cross multiply
    1,131.04x = 1,695.28 × 644.52
  4. Step 4: Simplify right side
    1,131.04x = 1,092,641.87
  5. Step 5: Solve for x
    x = 1,092,641.87/1,131.04
  6. Step 6: Final answer
    x = 966.05

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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.