Home / 1,254.28-1,715.55-1,234.12

Finding the Fourth Proportional to 1,254.28, 1,715.55 and 1,234.12

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Solution

The fourth proportional to 1,254.28, 1,715.55 and 1,234.12 is: 1,687.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.28 : 1,715.55 = 1,234.12 : x
  2. Step 2: Convert to fraction form
    1,254.28/1,715.55 = 1,234.12/x
  3. Step 3: Cross multiply
    1,254.28x = 1,715.55 × 1,234.12
  4. Step 4: Simplify right side
    1,254.28x = 2,117,194.57
  5. Step 5: Solve for x
    x = 2,117,194.57/1,254.28
  6. Step 6: Final answer
    x = 1,687.98

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.