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Finding the Fourth Proportional to 3,871.84, 5,350.80 and 3,249.76

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Solution

The fourth proportional to 3,871.84, 5,350.80 and 3,249.76 is: 4,491.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.84 : 5,350.80 = 3,249.76 : x
  2. Step 2: Convert to fraction form
    3,871.84/5,350.80 = 3,249.76/x
  3. Step 3: Cross multiply
    3,871.84x = 5,350.80 × 3,249.76
  4. Step 4: Simplify right side
    3,871.84x = 17,388,815.81
  5. Step 5: Solve for x
    x = 17,388,815.81/3,871.84
  6. Step 6: Final answer
    x = 4,491.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.