Home / 1,248.26-1,872.50-426.20

Finding the Fourth Proportional to 1,248.26, 1,872.50 and 426.20

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Solution

The fourth proportional to 1,248.26, 1,872.50 and 426.20 is: 639.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.26 : 1,872.50 = 426.20 : x
  2. Step 2: Convert to fraction form
    1,248.26/1,872.50 = 426.20/x
  3. Step 3: Cross multiply
    1,248.26x = 1,872.50 × 426.20
  4. Step 4: Simplify right side
    1,248.26x = 798,057.37
  5. Step 5: Solve for x
    x = 798,057.37/1,248.26
  6. Step 6: Final answer
    x = 639.34

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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.