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Finding the Fourth Proportional to 610.88, 843.62 and 400.95

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Solution

The fourth proportional to 610.88, 843.62 and 400.95 is: 553.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.88 : 843.62 = 400.95 : x
  2. Step 2: Convert to fraction form
    610.88/843.62 = 400.95/x
  3. Step 3: Cross multiply
    610.88x = 843.62 × 400.95
  4. Step 4: Simplify right side
    610.88x = 338,247.43
  5. Step 5: Solve for x
    x = 338,247.43/610.88
  6. Step 6: Final answer
    x = 553.71

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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.