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Finding the Fourth Proportional to 3,901.72, 5,852.13 and 979.80

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Solution

The fourth proportional to 3,901.72, 5,852.13 and 979.80 is: 1,469.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,901.72 : 5,852.13 = 979.80 : x
  2. Step 2: Convert to fraction form
    3,901.72/5,852.13 = 979.80/x
  3. Step 3: Cross multiply
    3,901.72x = 5,852.13 × 979.80
  4. Step 4: Simplify right side
    3,901.72x = 5,733,916.97
  5. Step 5: Solve for x
    x = 5,733,916.97/3,901.72
  6. Step 6: Final answer
    x = 1,469.59

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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.