Home / 1,412.40-2,118.68-425.24

Finding the Fourth Proportional to 1,412.40, 2,118.68 and 425.24

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Solution

The fourth proportional to 1,412.40, 2,118.68 and 425.24 is: 637.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.40 : 2,118.68 = 425.24 : x
  2. Step 2: Convert to fraction form
    1,412.40/2,118.68 = 425.24/x
  3. Step 3: Cross multiply
    1,412.40x = 2,118.68 × 425.24
  4. Step 4: Simplify right side
    1,412.40x = 900,947.48
  5. Step 5: Solve for x
    x = 900,947.48/1,412.40
  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.