Home / 1,479.12-2,218.80-439.14

Finding the Fourth Proportional to 1,479.12, 2,218.80 and 439.14

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Solution

The fourth proportional to 1,479.12, 2,218.80 and 439.14 is: 658.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.12 : 2,218.80 = 439.14 : x
  2. Step 2: Convert to fraction form
    1,479.12/2,218.80 = 439.14/x
  3. Step 3: Cross multiply
    1,479.12x = 2,218.80 × 439.14
  4. Step 4: Simplify right side
    1,479.12x = 974,363.83
  5. Step 5: Solve for x
    x = 974,363.83/1,479.12
  6. Step 6: Final answer
    x = 658.75

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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.