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Finding the Fourth Proportional to 869.01, 1,303.52 and 763.31

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Solution

The fourth proportional to 869.01, 1,303.52 and 763.31 is: 1,144.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.01 : 1,303.52 = 763.31 : x
  2. Step 2: Convert to fraction form
    869.01/1,303.52 = 763.31/x
  3. Step 3: Cross multiply
    869.01x = 1,303.52 × 763.31
  4. Step 4: Simplify right side
    869.01x = 994,989.85
  5. Step 5: Solve for x
    x = 994,989.85/869.01
  6. Step 6: Final answer
    x = 1,144.97

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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.