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Finding the Fourth Proportional to 1,803.88, 2,704.38 and 649

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Solution

The fourth proportional to 1,803.88, 2,704.38 and 649 is: 972.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,803.88 : 2,704.38 = 649 : x
  2. Step 2: Convert to fraction form
    1,803.88/2,704.38 = 649/x
  3. Step 3: Cross multiply
    1,803.88x = 2,704.38 × 649
  4. Step 4: Simplify right side
    1,803.88x = 1,755,142.62
  5. Step 5: Solve for x
    x = 1,755,142.62/1,803.88
  6. Step 6: Final answer
    x = 972.98

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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.