Home / 1,248.31-1,872.21-426.57

Finding the Fourth Proportional to 1,248.31, 1,872.21 and 426.57

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Solution

The fourth proportional to 1,248.31, 1,872.21 and 426.57 is: 639.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.31 : 1,872.21 = 426.57 : x
  2. Step 2: Convert to fraction form
    1,248.31/1,872.21 = 426.57/x
  3. Step 3: Cross multiply
    1,248.31x = 1,872.21 × 426.57
  4. Step 4: Simplify right side
    1,248.31x = 798,623.20
  5. Step 5: Solve for x
    x = 798,623.20/1,248.31
  6. Step 6: Final answer
    x = 639.76

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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.