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Finding the Fourth Proportional to 529.38, 793.55 and 221.45

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Solution

The fourth proportional to 529.38, 793.55 and 221.45 is: 331.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.38 : 793.55 = 221.45 : x
  2. Step 2: Convert to fraction form
    529.38/793.55 = 221.45/x
  3. Step 3: Cross multiply
    529.38x = 793.55 × 221.45
  4. Step 4: Simplify right side
    529.38x = 175,726.57
  5. Step 5: Solve for x
    x = 175,726.57/529.38
  6. Step 6: Final answer
    x = 331.95

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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.