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Finding the Fourth Proportional to 2,380.72, 3,571.10 and 649.36

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Solution

The fourth proportional to 2,380.72, 3,571.10 and 649.36 is: 974.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,380.72 : 3,571.10 = 649.36 : x
  2. Step 2: Convert to fraction form
    2,380.72/3,571.10 = 649.36/x
  3. Step 3: Cross multiply
    2,380.72x = 3,571.10 × 649.36
  4. Step 4: Simplify right side
    2,380.72x = 2,318,929.50
  5. Step 5: Solve for x
    x = 2,318,929.50/2,380.72
  6. Step 6: Final answer
    x = 974.05

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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.