Home / 1,388.12-2,073.17-1,257.86

Finding the Fourth Proportional to 1,388.12, 2,073.17 and 1,257.86

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Solution

The fourth proportional to 1,388.12, 2,073.17 and 1,257.86 is: 1,878.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388.12 : 2,073.17 = 1,257.86 : x
  2. Step 2: Convert to fraction form
    1,388.12/2,073.17 = 1,257.86/x
  3. Step 3: Cross multiply
    1,388.12x = 2,073.17 × 1,257.86
  4. Step 4: Simplify right side
    1,388.12x = 2,607,757.62
  5. Step 5: Solve for x
    x = 2,607,757.62/1,388.12
  6. Step 6: Final answer
    x = 1,878.63

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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.