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Finding the Fourth Proportional to 527.42, 790.60 and 253.42

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Solution

The fourth proportional to 527.42, 790.60 and 253.42 is: 379.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.42 : 790.60 = 253.42 : x
  2. Step 2: Convert to fraction form
    527.42/790.60 = 253.42/x
  3. Step 3: Cross multiply
    527.42x = 790.60 × 253.42
  4. Step 4: Simplify right side
    527.42x = 200,353.85
  5. Step 5: Solve for x
    x = 200,353.85/527.42
  6. Step 6: Final answer
    x = 379.88

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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.