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Finding the Fourth Proportional to 555.69, 833.87 and 321.73

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Solution

The fourth proportional to 555.69, 833.87 and 321.73 is: 482.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.69 : 833.87 = 321.73 : x
  2. Step 2: Convert to fraction form
    555.69/833.87 = 321.73/x
  3. Step 3: Cross multiply
    555.69x = 833.87 × 321.73
  4. Step 4: Simplify right side
    555.69x = 268,279.40
  5. Step 5: Solve for x
    x = 268,279.40/555.69
  6. Step 6: Final answer
    x = 482.78

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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.