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Finding the Fourth Proportional to 2,625.16, 3,936.76 and 869.84

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Solution

The fourth proportional to 2,625.16, 3,936.76 and 869.84 is: 1,304.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,625.16 : 3,936.76 = 869.84 : x
  2. Step 2: Convert to fraction form
    2,625.16/3,936.76 = 869.84/x
  3. Step 3: Cross multiply
    2,625.16x = 3,936.76 × 869.84
  4. Step 4: Simplify right side
    2,625.16x = 3,424,351.32
  5. Step 5: Solve for x
    x = 3,424,351.32/2,625.16
  6. Step 6: Final answer
    x = 1,304.44

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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.