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Finding the Fourth Proportional to 1,348.52, 2,021.82 and 644.92

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Solution

The fourth proportional to 1,348.52, 2,021.82 and 644.92 is: 966.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,348.52 : 2,021.82 = 644.92 : x
  2. Step 2: Convert to fraction form
    1,348.52/2,021.82 = 644.92/x
  3. Step 3: Cross multiply
    1,348.52x = 2,021.82 × 644.92
  4. Step 4: Simplify right side
    1,348.52x = 1,303,912.15
  5. Step 5: Solve for x
    x = 1,303,912.15/1,348.52
  6. Step 6: Final answer
    x = 966.92

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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.