Home / 1,489.28-2,233.67-393.71

Finding the Fourth Proportional to 1,489.28, 2,233.67 and 393.71

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Solution

The fourth proportional to 1,489.28, 2,233.67 and 393.71 is: 590.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.28 : 2,233.67 = 393.71 : x
  2. Step 2: Convert to fraction form
    1,489.28/2,233.67 = 393.71/x
  3. Step 3: Cross multiply
    1,489.28x = 2,233.67 × 393.71
  4. Step 4: Simplify right side
    1,489.28x = 879,405.08
  5. Step 5: Solve for x
    x = 879,405.08/1,489.28
  6. Step 6: Final answer
    x = 590.49

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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.