Home / 1,291.28-1,937.39-1,247.54

Finding the Fourth Proportional to 1,291.28, 1,937.39 and 1,247.54

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Solution

The fourth proportional to 1,291.28, 1,937.39 and 1,247.54 is: 1,871.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.28 : 1,937.39 = 1,247.54 : x
  2. Step 2: Convert to fraction form
    1,291.28/1,937.39 = 1,247.54/x
  3. Step 3: Cross multiply
    1,291.28x = 1,937.39 × 1,247.54
  4. Step 4: Simplify right side
    1,291.28x = 2,416,955.60
  5. Step 5: Solve for x
    x = 2,416,955.60/1,291.28
  6. Step 6: Final answer
    x = 1,871.76

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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.