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Finding the Fourth Proportional to 610.74, 842.94 and 400.55

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Solution

The fourth proportional to 610.74, 842.94 and 400.55 is: 552.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.74 : 842.94 = 400.55 : x
  2. Step 2: Convert to fraction form
    610.74/842.94 = 400.55/x
  3. Step 3: Cross multiply
    610.74x = 842.94 × 400.55
  4. Step 4: Simplify right side
    610.74x = 337,635.40
  5. Step 5: Solve for x
    x = 337,635.40/610.74
  6. Step 6: Final answer
    x = 552.83

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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.