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Finding the Fourth Proportional to 925.29, 1,380.42 and 900.18

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Solution

The fourth proportional to 925.29, 1,380.42 and 900.18 is: 1,342.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.29 : 1,380.42 = 900.18 : x
  2. Step 2: Convert to fraction form
    925.29/1,380.42 = 900.18/x
  3. Step 3: Cross multiply
    925.29x = 1,380.42 × 900.18
  4. Step 4: Simplify right side
    925.29x = 1,242,626.48
  5. Step 5: Solve for x
    x = 1,242,626.48/925.29
  6. Step 6: Final answer
    x = 1,342.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.