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Finding the Fourth Proportional to 2,104.64, 3,156.96 and 644.36

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Solution

The fourth proportional to 2,104.64, 3,156.96 and 644.36 is: 966.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,104.64 : 3,156.96 = 644.36 : x
  2. Step 2: Convert to fraction form
    2,104.64/3,156.96 = 644.36/x
  3. Step 3: Cross multiply
    2,104.64x = 3,156.96 × 644.36
  4. Step 4: Simplify right side
    2,104.64x = 2,034,218.75
  5. Step 5: Solve for x
    x = 2,034,218.75/2,104.64
  6. Step 6: Final answer
    x = 966.54

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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.