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Finding the Fourth Proportional to 2,591.96, 3,887.84 and 644.18

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Solution

The fourth proportional to 2,591.96, 3,887.84 and 644.18 is: 966.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,591.96 : 3,887.84 = 644.18 : x
  2. Step 2: Convert to fraction form
    2,591.96/3,887.84 = 644.18/x
  3. Step 3: Cross multiply
    2,591.96x = 3,887.84 × 644.18
  4. Step 4: Simplify right side
    2,591.96x = 2,504,468.77
  5. Step 5: Solve for x
    x = 2,504,468.77/2,591.96
  6. Step 6: Final answer
    x = 966.25

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1.5x scale

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.