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Finding the Fourth Proportional to 2,630.72, 3,940.95 and 1,532.80

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Solution

The fourth proportional to 2,630.72, 3,940.95 and 1,532.80 is: 2,296.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,630.72 : 3,940.95 = 1,532.80 : x
  2. Step 2: Convert to fraction form
    2,630.72/3,940.95 = 1,532.80/x
  3. Step 3: Cross multiply
    2,630.72x = 3,940.95 × 1,532.80
  4. Step 4: Simplify right side
    2,630.72x = 6,040,688.16
  5. Step 5: Solve for x
    x = 6,040,688.16/2,630.72
  6. Step 6: Final answer
    x = 2,296.21

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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.