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Finding the Fourth Proportional to 2,649.11, 3,972.15 and 799.95

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Solution

The fourth proportional to 2,649.11, 3,972.15 and 799.95 is: 1,199.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,649.11 : 3,972.15 = 799.95 : x
  2. Step 2: Convert to fraction form
    2,649.11/3,972.15 = 799.95/x
  3. Step 3: Cross multiply
    2,649.11x = 3,972.15 × 799.95
  4. Step 4: Simplify right side
    2,649.11x = 3,177,521.39
  5. Step 5: Solve for x
    x = 3,177,521.39/2,649.11
  6. Step 6: Final answer
    x = 1,199.47

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1.5x scale

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.