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Finding the Fourth Proportional to 1,351.57, 2,028.54 and 658.75

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Solution

The fourth proportional to 1,351.57, 2,028.54 and 658.75 is: 988.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.57 : 2,028.54 = 658.75 : x
  2. Step 2: Convert to fraction form
    1,351.57/2,028.54 = 658.75/x
  3. Step 3: Cross multiply
    1,351.57x = 2,028.54 × 658.75
  4. Step 4: Simplify right side
    1,351.57x = 1,336,300.73
  5. Step 5: Solve for x
    x = 1,336,300.73/1,351.57
  6. Step 6: Final answer
    x = 988.70

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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.