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Finding the Fourth Proportional to 1,479.66, 2,218.72 and 439.52

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Solution

The fourth proportional to 1,479.66, 2,218.72 and 439.52 is: 659.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.66 : 2,218.72 = 439.52 : x
  2. Step 2: Convert to fraction form
    1,479.66/2,218.72 = 439.52/x
  3. Step 3: Cross multiply
    1,479.66x = 2,218.72 × 439.52
  4. Step 4: Simplify right side
    1,479.66x = 975,177.91
  5. Step 5: Solve for x
    x = 975,177.91/1,479.66
  6. Step 6: Final answer
    x = 659.05

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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.