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Finding the Fourth Proportional to 552.40, 827.84 and 278.67

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Solution

The fourth proportional to 552.40, 827.84 and 278.67 is: 417.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.40 : 827.84 = 278.67 : x
  2. Step 2: Convert to fraction form
    552.40/827.84 = 278.67/x
  3. Step 3: Cross multiply
    552.40x = 827.84 × 278.67
  4. Step 4: Simplify right side
    552.40x = 230,692.78
  5. Step 5: Solve for x
    x = 230,692.78/552.40
  6. Step 6: Final answer
    x = 417.62

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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.