Home / 1,247.42-1,869.97-425.12

Finding the Fourth Proportional to 1,247.42, 1,869.97 and 425.12

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Solution

The fourth proportional to 1,247.42, 1,869.97 and 425.12 is: 637.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.42 : 1,869.97 = 425.12 : x
  2. Step 2: Convert to fraction form
    1,247.42/1,869.97 = 425.12/x
  3. Step 3: Cross multiply
    1,247.42x = 1,869.97 × 425.12
  4. Step 4: Simplify right side
    1,247.42x = 794,961.65
  5. Step 5: Solve for x
    x = 794,961.65/1,247.42
  6. Step 6: Final answer
    x = 637.28

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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.