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Finding the Fourth Proportional to 3,491.84, 4,818.99 and 1,979.39

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Solution

The fourth proportional to 3,491.84, 4,818.99 and 1,979.39 is: 2,731.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,491.84 : 4,818.99 = 1,979.39 : x
  2. Step 2: Convert to fraction form
    3,491.84/4,818.99 = 1,979.39/x
  3. Step 3: Cross multiply
    3,491.84x = 4,818.99 × 1,979.39
  4. Step 4: Simplify right side
    3,491.84x = 9,538,660.62
  5. Step 5: Solve for x
    x = 9,538,660.62/3,491.84
  6. Step 6: Final answer
    x = 2,731.70

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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.