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Finding the Fourth Proportional to 774.52, 1,161.90 and 487.96

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Solution

The fourth proportional to 774.52, 1,161.90 and 487.96 is: 732.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.52 : 1,161.90 = 487.96 : x
  2. Step 2: Convert to fraction form
    774.52/1,161.90 = 487.96/x
  3. Step 3: Cross multiply
    774.52x = 1,161.90 × 487.96
  4. Step 4: Simplify right side
    774.52x = 566,960.72
  5. Step 5: Solve for x
    x = 566,960.72/774.52
  6. Step 6: Final answer
    x = 732.02

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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.