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Finding the Fourth Proportional to 900.32, 1,239.72 and 769.04

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Solution

The fourth proportional to 900.32, 1,239.72 and 769.04 is: 1,058.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.32 : 1,239.72 = 769.04 : x
  2. Step 2: Convert to fraction form
    900.32/1,239.72 = 769.04/x
  3. Step 3: Cross multiply
    900.32x = 1,239.72 × 769.04
  4. Step 4: Simplify right side
    900.32x = 953,394.27
  5. Step 5: Solve for x
    x = 953,394.27/900.32
  6. Step 6: Final answer
    x = 1,058.95

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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.