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Finding the Fourth Proportional to 2,001.70, 3,002.16 and 685.36

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Solution

The fourth proportional to 2,001.70, 3,002.16 and 685.36 is: 1,027.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,001.70 : 3,002.16 = 685.36 : x
  2. Step 2: Convert to fraction form
    2,001.70/3,002.16 = 685.36/x
  3. Step 3: Cross multiply
    2,001.70x = 3,002.16 × 685.36
  4. Step 4: Simplify right side
    2,001.70x = 2,057,560.38
  5. Step 5: Solve for x
    x = 2,057,560.38/2,001.70
  6. Step 6: Final answer
    x = 1,027.91

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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.