Home / 1,489.28-2,233.76-668.20

Finding the Fourth Proportional to 1,489.28, 2,233.76 and 668.20

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Solution

The fourth proportional to 1,489.28, 2,233.76 and 668.20 is: 1,002.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.28 : 2,233.76 = 668.20 : x
  2. Step 2: Convert to fraction form
    1,489.28/2,233.76 = 668.20/x
  3. Step 3: Cross multiply
    1,489.28x = 2,233.76 × 668.20
  4. Step 4: Simplify right side
    1,489.28x = 1,492,598.43
  5. Step 5: Solve for x
    x = 1,492,598.43/1,489.28
  6. Step 6: Final answer
    x = 1,002.23

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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.