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Finding the Fourth Proportional to 2,285.42, 3,428.20 and 641.97

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Solution

The fourth proportional to 2,285.42, 3,428.20 and 641.97 is: 962.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,285.42 : 3,428.20 = 641.97 : x
  2. Step 2: Convert to fraction form
    2,285.42/3,428.20 = 641.97/x
  3. Step 3: Cross multiply
    2,285.42x = 3,428.20 × 641.97
  4. Step 4: Simplify right side
    2,285.42x = 2,200,801.55
  5. Step 5: Solve for x
    x = 2,200,801.55/2,285.42
  6. Step 6: Final answer
    x = 962.97

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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.