Home / 1,479.21-2,218.40-439.17

Finding the Fourth Proportional to 1,479.21, 2,218.40 and 439.17

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Solution

The fourth proportional to 1,479.21, 2,218.40 and 439.17 is: 658.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.21 : 2,218.40 = 439.17 : x
  2. Step 2: Convert to fraction form
    1,479.21/2,218.40 = 439.17/x
  3. Step 3: Cross multiply
    1,479.21x = 2,218.40 × 439.17
  4. Step 4: Simplify right side
    1,479.21x = 974,254.73
  5. Step 5: Solve for x
    x = 974,254.73/1,479.21
  6. Step 6: Final answer
    x = 658.63

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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.