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Finding the Fourth Proportional to 773.28, 1,159.24 and 311.05

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Solution

The fourth proportional to 773.28, 1,159.24 and 311.05 is: 466.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.28 : 1,159.24 = 311.05 : x
  2. Step 2: Convert to fraction form
    773.28/1,159.24 = 311.05/x
  3. Step 3: Cross multiply
    773.28x = 1,159.24 × 311.05
  4. Step 4: Simplify right side
    773.28x = 360,581.60
  5. Step 5: Solve for x
    x = 360,581.60/773.28
  6. Step 6: Final answer
    x = 466.30

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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.