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Finding the Fourth Proportional to 493.28, 740.16 and 276.80

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Solution

The fourth proportional to 493.28, 740.16 and 276.80 is: 415.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.28 : 740.16 = 276.80 : x
  2. Step 2: Convert to fraction form
    493.28/740.16 = 276.80/x
  3. Step 3: Cross multiply
    493.28x = 740.16 × 276.80
  4. Step 4: Simplify right side
    493.28x = 204,876.29
  5. Step 5: Solve for x
    x = 204,876.29/493.28
  6. Step 6: Final answer
    x = 415.33

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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.