Home / 1,222.14-1,686.24-724.75

Finding the Fourth Proportional to 1,222.14, 1,686.24 and 724.75

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Solution

The fourth proportional to 1,222.14, 1,686.24 and 724.75 is: 999.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222.14 : 1,686.24 = 724.75 : x
  2. Step 2: Convert to fraction form
    1,222.14/1,686.24 = 724.75/x
  3. Step 3: Cross multiply
    1,222.14x = 1,686.24 × 724.75
  4. Step 4: Simplify right side
    1,222.14x = 1,222,102.44
  5. Step 5: Solve for x
    x = 1,222,102.44/1,222.14
  6. Step 6: Final answer
    x = 999.97

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1.5x scale

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.