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Finding the Fourth Proportional to 783.26, 1,080.79 and 447.11

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Solution

The fourth proportional to 783.26, 1,080.79 and 447.11 is: 616.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.26 : 1,080.79 = 447.11 : x
  2. Step 2: Convert to fraction form
    783.26/1,080.79 = 447.11/x
  3. Step 3: Cross multiply
    783.26x = 1,080.79 × 447.11
  4. Step 4: Simplify right side
    783.26x = 483,232.02
  5. Step 5: Solve for x
    x = 483,232.02/783.26
  6. Step 6: Final answer
    x = 616.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.