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Finding the Fourth Proportional to 2,104.98, 3,158 and 644.06

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Solution

The fourth proportional to 2,104.98, 3,158 and 644.06 is: 966.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,104.98 : 3,158 = 644.06 : x
  2. Step 2: Convert to fraction form
    2,104.98/3,158 = 644.06/x
  3. Step 3: Cross multiply
    2,104.98x = 3,158 × 644.06
  4. Step 4: Simplify right side
    2,104.98x = 2,033,941.48
  5. Step 5: Solve for x
    x = 2,033,941.48/2,104.98
  6. Step 6: Final answer
    x = 966.25

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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.