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Finding the Fourth Proportional to 773.49, 1,159.95 and 311.12

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Solution

The fourth proportional to 773.49, 1,159.95 and 311.12 is: 466.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.49 : 1,159.95 = 311.12 : x
  2. Step 2: Convert to fraction form
    773.49/1,159.95 = 311.12/x
  3. Step 3: Cross multiply
    773.49x = 1,159.95 × 311.12
  4. Step 4: Simplify right side
    773.49x = 360,877.84
  5. Step 5: Solve for x
    x = 360,877.84/773.49
  6. Step 6: Final answer
    x = 466.56

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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.