Home / 1,292.46-1,938.27-426.57

Finding the Fourth Proportional to 1,292.46, 1,938.27 and 426.57

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Solution

The fourth proportional to 1,292.46, 1,938.27 and 426.57 is: 639.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.46 : 1,938.27 = 426.57 : x
  2. Step 2: Convert to fraction form
    1,292.46/1,938.27 = 426.57/x
  3. Step 3: Cross multiply
    1,292.46x = 1,938.27 × 426.57
  4. Step 4: Simplify right side
    1,292.46x = 826,807.83
  5. Step 5: Solve for x
    x = 826,807.83/1,292.46
  6. Step 6: Final answer
    x = 639.72

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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.