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Finding the Fourth Proportional to 3,979.84, 5,963.28 and 3,153.64

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Solution

The fourth proportional to 3,979.84, 5,963.28 and 3,153.64 is: 4,725.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.84 : 5,963.28 = 3,153.64 : x
  2. Step 2: Convert to fraction form
    3,979.84/5,963.28 = 3,153.64/x
  3. Step 3: Cross multiply
    3,979.84x = 5,963.28 × 3,153.64
  4. Step 4: Simplify right side
    3,979.84x = 18,806,038.34
  5. Step 5: Solve for x
    x = 18,806,038.34/3,979.84
  6. Step 6: Final answer
    x = 4,725.33

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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.