Home / 1,292.11-1,938.17-426.42

Finding the Fourth Proportional to 1,292.11, 1,938.17 and 426.42

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Solution

The fourth proportional to 1,292.11, 1,938.17 and 426.42 is: 639.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.11 : 1,938.17 = 426.42 : x
  2. Step 2: Convert to fraction form
    1,292.11/1,938.17 = 426.42/x
  3. Step 3: Cross multiply
    1,292.11x = 1,938.17 × 426.42
  4. Step 4: Simplify right side
    1,292.11x = 826,472.32
  5. Step 5: Solve for x
    x = 826,472.32/1,292.11
  6. Step 6: Final answer
    x = 639.63

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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.