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Finding the Fourth Proportional to 662.83, 911.66 and 531.55

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Solution

The fourth proportional to 662.83, 911.66 and 531.55 is: 731.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.83 : 911.66 = 531.55 : x
  2. Step 2: Convert to fraction form
    662.83/911.66 = 531.55/x
  3. Step 3: Cross multiply
    662.83x = 911.66 × 531.55
  4. Step 4: Simplify right side
    662.83x = 484,589.93
  5. Step 5: Solve for x
    x = 484,589.93/662.83
  6. Step 6: Final answer
    x = 731.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.