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Finding the Fourth Proportional to 2,200.61, 3,301.45 and 640.62

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Solution

The fourth proportional to 2,200.61, 3,301.45 and 640.62 is: 961.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,200.61 : 3,301.45 = 640.62 : x
  2. Step 2: Convert to fraction form
    2,200.61/3,301.45 = 640.62/x
  3. Step 3: Cross multiply
    2,200.61x = 3,301.45 × 640.62
  4. Step 4: Simplify right side
    2,200.61x = 2,114,988.42
  5. Step 5: Solve for x
    x = 2,114,988.42/2,200.61
  6. Step 6: Final answer
    x = 961.09

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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.