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Finding the Fourth Proportional to 773.56, 1,161 and 312.25

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Solution

The fourth proportional to 773.56, 1,161 and 312.25 is: 468.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.56 : 1,161 = 312.25 : x
  2. Step 2: Convert to fraction form
    773.56/1,161 = 312.25/x
  3. Step 3: Cross multiply
    773.56x = 1,161 × 312.25
  4. Step 4: Simplify right side
    773.56x = 362,522.25
  5. Step 5: Solve for x
    x = 362,522.25/773.56
  6. Step 6: Final answer
    x = 468.64

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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.