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Finding the Fourth Proportional to 610.75, 842.84 and 348.85

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Solution

The fourth proportional to 610.75, 842.84 and 348.85 is: 481.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.75 : 842.84 = 348.85 : x
  2. Step 2: Convert to fraction form
    610.75/842.84 = 348.85/x
  3. Step 3: Cross multiply
    610.75x = 842.84 × 348.85
  4. Step 4: Simplify right side
    610.75x = 294,024.73
  5. Step 5: Solve for x
    x = 294,024.73/610.75
  6. Step 6: Final answer
    x = 481.42

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Find fourth proportional to 305.38, 421.42 and 174.43
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1.5x scale

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.