Home / 1,687.47-2,331.68-1,297.86

Finding the Fourth Proportional to 1,687.47, 2,331.68 and 1,297.86

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Solution

The fourth proportional to 1,687.47, 2,331.68 and 1,297.86 is: 1,793.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,687.47 : 2,331.68 = 1,297.86 : x
  2. Step 2: Convert to fraction form
    1,687.47/2,331.68 = 1,297.86/x
  3. Step 3: Cross multiply
    1,687.47x = 2,331.68 × 1,297.86
  4. Step 4: Simplify right side
    1,687.47x = 3,026,194.20
  5. Step 5: Solve for x
    x = 3,026,194.20/1,687.47
  6. Step 6: Final answer
    x = 1,793.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.