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Finding the Fourth Proportional to 527.39, 790.91 and 219.18

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Solution

The fourth proportional to 527.39, 790.91 and 219.18 is: 328.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.39 : 790.91 = 219.18 : x
  2. Step 2: Convert to fraction form
    527.39/790.91 = 219.18/x
  3. Step 3: Cross multiply
    527.39x = 790.91 × 219.18
  4. Step 4: Simplify right side
    527.39x = 173,353.35
  5. Step 5: Solve for x
    x = 173,353.35/527.39
  6. Step 6: Final answer
    x = 328.70

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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.