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Finding the Fourth Proportional to 685.98, 1,029.01 and 223.82

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Solution

The fourth proportional to 685.98, 1,029.01 and 223.82 is: 335.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.98 : 1,029.01 = 223.82 : x
  2. Step 2: Convert to fraction form
    685.98/1,029.01 = 223.82/x
  3. Step 3: Cross multiply
    685.98x = 1,029.01 × 223.82
  4. Step 4: Simplify right side
    685.98x = 230,316.96
  5. Step 5: Solve for x
    x = 230,316.96/685.98
  6. Step 6: Final answer
    x = 335.75

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Double scale
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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.