Home / 1,296.78-1,937.62-1,138.61

Finding the Fourth Proportional to 1,296.78, 1,937.62 and 1,138.61

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Solution

The fourth proportional to 1,296.78, 1,937.62 and 1,138.61 is: 1,701.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296.78 : 1,937.62 = 1,138.61 : x
  2. Step 2: Convert to fraction form
    1,296.78/1,937.62 = 1,138.61/x
  3. Step 3: Cross multiply
    1,296.78x = 1,937.62 × 1,138.61
  4. Step 4: Simplify right side
    1,296.78x = 2,206,188.88
  5. Step 5: Solve for x
    x = 2,206,188.88/1,296.78
  6. Step 6: Final answer
    x = 1,701.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.