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Finding the Fourth Proportional to 3,604.78, 5,407.20 and 1,007.80

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Solution

The fourth proportional to 3,604.78, 5,407.20 and 1,007.80 is: 1,511.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,604.78 : 5,407.20 = 1,007.80 : x
  2. Step 2: Convert to fraction form
    3,604.78/5,407.20 = 1,007.80/x
  3. Step 3: Cross multiply
    3,604.78x = 5,407.20 × 1,007.80
  4. Step 4: Simplify right side
    3,604.78x = 5,449,376.16
  5. Step 5: Solve for x
    x = 5,449,376.16/3,604.78
  6. Step 6: Final answer
    x = 1,511.71

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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.