Home / 2,154.18-3,231.30-615.18

Finding the Fourth Proportional to 2,154.18, 3,231.30 and 615.18

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Solution

The fourth proportional to 2,154.18, 3,231.30 and 615.18 is: 922.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.18 : 3,231.30 = 615.18 : x
  2. Step 2: Convert to fraction form
    2,154.18/3,231.30 = 615.18/x
  3. Step 3: Cross multiply
    2,154.18x = 3,231.30 × 615.18
  4. Step 4: Simplify right side
    2,154.18x = 1,987,831.13
  5. Step 5: Solve for x
    x = 1,987,831.13/2,154.18
  6. Step 6: Final answer
    x = 922.78

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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.