Home / 1,247.40-1,874.70-1,225.80

Finding the Fourth Proportional to 1,247.40, 1,874.70 and 1,225.80

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Solution

The fourth proportional to 1,247.40, 1,874.70 and 1,225.80 is: 1,842.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.40 : 1,874.70 = 1,225.80 : x
  2. Step 2: Convert to fraction form
    1,247.40/1,874.70 = 1,225.80/x
  3. Step 3: Cross multiply
    1,247.40x = 1,874.70 × 1,225.80
  4. Step 4: Simplify right side
    1,247.40x = 2,298,007.26
  5. Step 5: Solve for x
    x = 2,298,007.26/1,247.40
  6. Step 6: Final answer
    x = 1,842.24

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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.