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Finding the Fourth Proportional to 529.30, 794.20 and 221.06

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Solution

The fourth proportional to 529.30, 794.20 and 221.06 is: 331.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.30 : 794.20 = 221.06 : x
  2. Step 2: Convert to fraction form
    529.30/794.20 = 221.06/x
  3. Step 3: Cross multiply
    529.30x = 794.20 × 221.06
  4. Step 4: Simplify right side
    529.30x = 175,565.85
  5. Step 5: Solve for x
    x = 175,565.85/529.30
  6. Step 6: Final answer
    x = 331.69

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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.