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Finding the Fourth Proportional to 2,940.80, 4,411.16 and 749.52

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Solution

The fourth proportional to 2,940.80, 4,411.16 and 749.52 is: 1,124.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,940.80 : 4,411.16 = 749.52 : x
  2. Step 2: Convert to fraction form
    2,940.80/4,411.16 = 749.52/x
  3. Step 3: Cross multiply
    2,940.80x = 4,411.16 × 749.52
  4. Step 4: Simplify right side
    2,940.80x = 3,306,251.71
  5. Step 5: Solve for x
    x = 3,306,251.71/2,940.80
  6. Step 6: Final answer
    x = 1,124.27

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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.