Home / 1,418.12-2,127.18-392.12

Finding the Fourth Proportional to 1,418.12, 2,127.18 and 392.12

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Solution

The fourth proportional to 1,418.12, 2,127.18 and 392.12 is: 588.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.12 : 2,127.18 = 392.12 : x
  2. Step 2: Convert to fraction form
    1,418.12/2,127.18 = 392.12/x
  3. Step 3: Cross multiply
    1,418.12x = 2,127.18 × 392.12
  4. Step 4: Simplify right side
    1,418.12x = 834,109.82
  5. Step 5: Solve for x
    x = 834,109.82/1,418.12
  6. Step 6: Final answer
    x = 588.18

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Double scale
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Similar ratio
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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.