Home / 1,486.28-2,229.33-390.62

Finding the Fourth Proportional to 1,486.28, 2,229.33 and 390.62

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Solution

The fourth proportional to 1,486.28, 2,229.33 and 390.62 is: 585.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,486.28 : 2,229.33 = 390.62 : x
  2. Step 2: Convert to fraction form
    1,486.28/2,229.33 = 390.62/x
  3. Step 3: Cross multiply
    1,486.28x = 2,229.33 × 390.62
  4. Step 4: Simplify right side
    1,486.28x = 870,820.88
  5. Step 5: Solve for x
    x = 870,820.88/1,486.28
  6. Step 6: Final answer
    x = 585.91

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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.