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Finding the Fourth Proportional to 276.96, 417.33 and 275.28

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Solution

The fourth proportional to 276.96, 417.33 and 275.28 is: 414.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.96 : 417.33 = 275.28 : x
  2. Step 2: Convert to fraction form
    276.96/417.33 = 275.28/x
  3. Step 3: Cross multiply
    276.96x = 417.33 × 275.28
  4. Step 4: Simplify right side
    276.96x = 114,882.60
  5. Step 5: Solve for x
    x = 114,882.60/276.96
  6. Step 6: Final answer
    x = 414.80

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.