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Finding the Fourth Proportional to 527.55, 790.89 and 219.63

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Solution

The fourth proportional to 527.55, 790.89 and 219.63 is: 329.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.55 : 790.89 = 219.63 : x
  2. Step 2: Convert to fraction form
    527.55/790.89 = 219.63/x
  3. Step 3: Cross multiply
    527.55x = 790.89 × 219.63
  4. Step 4: Simplify right side
    527.55x = 173,703.17
  5. Step 5: Solve for x
    x = 173,703.17/527.55
  6. Step 6: Final answer
    x = 329.26

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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.