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Finding the Fourth Proportional to 1,951.20, 2,921.02 and 1,255.81

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Solution

The fourth proportional to 1,951.20, 2,921.02 and 1,255.81 is: 1,879.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,951.20 : 2,921.02 = 1,255.81 : x
  2. Step 2: Convert to fraction form
    1,951.20/2,921.02 = 1,255.81/x
  3. Step 3: Cross multiply
    1,951.20x = 2,921.02 × 1,255.81
  4. Step 4: Simplify right side
    1,951.20x = 3,668,246.13
  5. Step 5: Solve for x
    x = 3,668,246.13/1,951.20
  6. Step 6: Final answer
    x = 1,879.99

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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.