Home / 1,520.90-2,281.31-425.26

Finding the Fourth Proportional to 1,520.90, 2,281.31 and 425.26

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Solution

The fourth proportional to 1,520.90, 2,281.31 and 425.26 is: 637.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.90 : 2,281.31 = 425.26 : x
  2. Step 2: Convert to fraction form
    1,520.90/2,281.31 = 425.26/x
  3. Step 3: Cross multiply
    1,520.90x = 2,281.31 × 425.26
  4. Step 4: Simplify right side
    1,520.90x = 970,149.89
  5. Step 5: Solve for x
    x = 970,149.89/1,520.90
  6. Step 6: Final answer
    x = 637.88

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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.