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Finding the Fourth Proportional to 819.56, 1,228.44 and 576.02

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Solution

The fourth proportional to 819.56, 1,228.44 and 576.02 is: 863.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    819.56 : 1,228.44 = 576.02 : x
  2. Step 2: Convert to fraction form
    819.56/1,228.44 = 576.02/x
  3. Step 3: Cross multiply
    819.56x = 1,228.44 × 576.02
  4. Step 4: Simplify right side
    819.56x = 707,606.01
  5. Step 5: Solve for x
    x = 707,606.01/819.56
  6. Step 6: Final answer
    x = 863.40

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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.