Home / 2,287.85-3,431.97-1,247.40

Finding the Fourth Proportional to 2,287.85, 3,431.97 and 1,247.40

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Solution

The fourth proportional to 2,287.85, 3,431.97 and 1,247.40 is: 1,871.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,287.85 : 3,431.97 = 1,247.40 : x
  2. Step 2: Convert to fraction form
    2,287.85/3,431.97 = 1,247.40/x
  3. Step 3: Cross multiply
    2,287.85x = 3,431.97 × 1,247.40
  4. Step 4: Simplify right side
    2,287.85x = 4,281,039.38
  5. Step 5: Solve for x
    x = 4,281,039.38/2,287.85
  6. Step 6: Final answer
    x = 1,871.21

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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.