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Finding the Fourth Proportional to 819.03, 1,228.30 and 356.70

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Solution

The fourth proportional to 819.03, 1,228.30 and 356.70 is: 534.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    819.03 : 1,228.30 = 356.70 : x
  2. Step 2: Convert to fraction form
    819.03/1,228.30 = 356.70/x
  3. Step 3: Cross multiply
    819.03x = 1,228.30 × 356.70
  4. Step 4: Simplify right side
    819.03x = 438,134.61
  5. Step 5: Solve for x
    x = 438,134.61/819.03
  6. Step 6: Final answer
    x = 534.94

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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.