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Finding the Fourth Proportional to 3,715.80, 5,560.80 and 2,929.20

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Solution

The fourth proportional to 3,715.80, 5,560.80 and 2,929.20 is: 4,383.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,715.80 : 5,560.80 = 2,929.20 : x
  2. Step 2: Convert to fraction form
    3,715.80/5,560.80 = 2,929.20/x
  3. Step 3: Cross multiply
    3,715.80x = 5,560.80 × 2,929.20
  4. Step 4: Simplify right side
    3,715.80x = 16,288,695.36
  5. Step 5: Solve for x
    x = 16,288,695.36/3,715.80
  6. Step 6: Final answer
    x = 4,383.63

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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.