Home / 1,370.40-2,049.60-1,225.20

Finding the Fourth Proportional to 1,370.40, 2,049.60 and 1,225.20

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Solution

The fourth proportional to 1,370.40, 2,049.60 and 1,225.20 is: 1,832.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370.40 : 2,049.60 = 1,225.20 : x
  2. Step 2: Convert to fraction form
    1,370.40/2,049.60 = 1,225.20/x
  3. Step 3: Cross multiply
    1,370.40x = 2,049.60 × 1,225.20
  4. Step 4: Simplify right side
    1,370.40x = 2,511,169.92
  5. Step 5: Solve for x
    x = 2,511,169.92/1,370.40
  6. Step 6: Final answer
    x = 1,832.44

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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.