Home / 2,412.30-3,618.45-1,257.90

Finding the Fourth Proportional to 2,412.30, 3,618.45 and 1,257.90

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Solution

The fourth proportional to 2,412.30, 3,618.45 and 1,257.90 is: 1,886.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,412.30 : 3,618.45 = 1,257.90 : x
  2. Step 2: Convert to fraction form
    2,412.30/3,618.45 = 1,257.90/x
  3. Step 3: Cross multiply
    2,412.30x = 3,618.45 × 1,257.90
  4. Step 4: Simplify right side
    2,412.30x = 4,551,648.26
  5. Step 5: Solve for x
    x = 4,551,648.26/2,412.30
  6. Step 6: Final answer
    x = 1,886.85

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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.