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Finding the Fourth Proportional to 610.80, 842.38 and 471.23

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Solution

The fourth proportional to 610.80, 842.38 and 471.23 is: 649.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.80 : 842.38 = 471.23 : x
  2. Step 2: Convert to fraction form
    610.80/842.38 = 471.23/x
  3. Step 3: Cross multiply
    610.80x = 842.38 × 471.23
  4. Step 4: Simplify right side
    610.80x = 396,954.73
  5. Step 5: Solve for x
    x = 396,954.73/610.80
  6. Step 6: Final answer
    x = 649.89

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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.