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Finding the Fourth Proportional to 527.20, 790.88 and 253.42

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Solution

The fourth proportional to 527.20, 790.88 and 253.42 is: 380.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.20 : 790.88 = 253.42 : x
  2. Step 2: Convert to fraction form
    527.20/790.88 = 253.42/x
  3. Step 3: Cross multiply
    527.20x = 790.88 × 253.42
  4. Step 4: Simplify right side
    527.20x = 200,424.81
  5. Step 5: Solve for x
    x = 200,424.81/527.20
  6. Step 6: Final answer
    x = 380.17

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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.