Home / 1,418.25-2,127.38-392.25

Finding the Fourth Proportional to 1,418.25, 2,127.38 and 392.25

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Solution

The fourth proportional to 1,418.25, 2,127.38 and 392.25 is: 588.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.25 : 2,127.38 = 392.25 : x
  2. Step 2: Convert to fraction form
    1,418.25/2,127.38 = 392.25/x
  3. Step 3: Cross multiply
    1,418.25x = 2,127.38 × 392.25
  4. Step 4: Simplify right side
    1,418.25x = 834,462.84
  5. Step 5: Solve for x
    x = 834,462.84/1,418.25
  6. Step 6: Final answer
    x = 588.38

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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.