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Finding the Fourth Proportional to 1,614.46, 2,422.29 and 920.70

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Solution

The fourth proportional to 1,614.46, 2,422.29 and 920.70 is: 1,381.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,614.46 : 2,422.29 = 920.70 : x
  2. Step 2: Convert to fraction form
    1,614.46/2,422.29 = 920.70/x
  3. Step 3: Cross multiply
    1,614.46x = 2,422.29 × 920.70
  4. Step 4: Simplify right side
    1,614.46x = 2,230,202.40
  5. Step 5: Solve for x
    x = 2,230,202.40/1,614.46
  6. Step 6: Final answer
    x = 1,381.39

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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.