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Finding the Fourth Proportional to 800.81, 1,200.11 and 605.66

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Solution

The fourth proportional to 800.81, 1,200.11 and 605.66 is: 907.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.81 : 1,200.11 = 605.66 : x
  2. Step 2: Convert to fraction form
    800.81/1,200.11 = 605.66/x
  3. Step 3: Cross multiply
    800.81x = 1,200.11 × 605.66
  4. Step 4: Simplify right side
    800.81x = 726,849.59
  5. Step 5: Solve for x
    x = 726,849.59/800.81
  6. Step 6: Final answer
    x = 907.64

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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.