Home / 1,418.40-2,127.52-725.34

Finding the Fourth Proportional to 1,418.40, 2,127.52 and 725.34

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Solution

The fourth proportional to 1,418.40, 2,127.52 and 725.34 is: 1,087.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.40 : 2,127.52 = 725.34 : x
  2. Step 2: Convert to fraction form
    1,418.40/2,127.52 = 725.34/x
  3. Step 3: Cross multiply
    1,418.40x = 2,127.52 × 725.34
  4. Step 4: Simplify right side
    1,418.40x = 1,543,175.36
  5. Step 5: Solve for x
    x = 1,543,175.36/1,418.40
  6. Step 6: Final answer
    x = 1,087.97

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1.5x scale

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.