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Finding the Fourth Proportional to 801.55, 1,106.07 and 447.43

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Solution

The fourth proportional to 801.55, 1,106.07 and 447.43 is: 617.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.55 : 1,106.07 = 447.43 : x
  2. Step 2: Convert to fraction form
    801.55/1,106.07 = 447.43/x
  3. Step 3: Cross multiply
    801.55x = 1,106.07 × 447.43
  4. Step 4: Simplify right side
    801.55x = 494,888.90
  5. Step 5: Solve for x
    x = 494,888.90/801.55
  6. Step 6: Final answer
    x = 617.41

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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.