Home / 1,480.12-2,219.61-439.88

Finding the Fourth Proportional to 1,480.12, 2,219.61 and 439.88

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Solution

The fourth proportional to 1,480.12, 2,219.61 and 439.88 is: 659.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,480.12 : 2,219.61 = 439.88 : x
  2. Step 2: Convert to fraction form
    1,480.12/2,219.61 = 439.88/x
  3. Step 3: Cross multiply
    1,480.12x = 2,219.61 × 439.88
  4. Step 4: Simplify right side
    1,480.12x = 976,362.05
  5. Step 5: Solve for x
    x = 976,362.05/1,480.12
  6. Step 6: Final answer
    x = 659.65

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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.