Home / 1,488.20-2,232.20-392.57

Finding the Fourth Proportional to 1,488.20, 2,232.20 and 392.57

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Solution

The fourth proportional to 1,488.20, 2,232.20 and 392.57 is: 588.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,488.20 : 2,232.20 = 392.57 : x
  2. Step 2: Convert to fraction form
    1,488.20/2,232.20 = 392.57/x
  3. Step 3: Cross multiply
    1,488.20x = 2,232.20 × 392.57
  4. Step 4: Simplify right side
    1,488.20x = 876,281.63
  5. Step 5: Solve for x
    x = 876,281.63/1,488.20
  6. Step 6: Final answer
    x = 588.82

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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.