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Finding the Fourth Proportional to 610.76, 842.76 and 348.68

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Solution

The fourth proportional to 610.76, 842.76 and 348.68 is: 481.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.76 : 842.76 = 348.68 : x
  2. Step 2: Convert to fraction form
    610.76/842.76 = 348.68/x
  3. Step 3: Cross multiply
    610.76x = 842.76 × 348.68
  4. Step 4: Simplify right side
    610.76x = 293,853.56
  5. Step 5: Solve for x
    x = 293,853.56/610.76
  6. Step 6: Final answer
    x = 481.13

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Find fourth proportional to 305.38, 421.38 and 174.34
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Double scale
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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.