Home / 1,479.59-2,217.29-821.75

Finding the Fourth Proportional to 1,479.59, 2,217.29 and 821.75

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Solution

The fourth proportional to 1,479.59, 2,217.29 and 821.75 is: 1,231.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.59 : 2,217.29 = 821.75 : x
  2. Step 2: Convert to fraction form
    1,479.59/2,217.29 = 821.75/x
  3. Step 3: Cross multiply
    1,479.59x = 2,217.29 × 821.75
  4. Step 4: Simplify right side
    1,479.59x = 1,822,059.49
  5. Step 5: Solve for x
    x = 1,822,059.49/1,479.59
  6. Step 6: Final answer
    x = 1,231.47

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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.