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Finding the Fourth Proportional to 801.88, 1,106.62 and 605.05

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Solution

The fourth proportional to 801.88, 1,106.62 and 605.05 is: 834.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.88 : 1,106.62 = 605.05 : x
  2. Step 2: Convert to fraction form
    801.88/1,106.62 = 605.05/x
  3. Step 3: Cross multiply
    801.88x = 1,106.62 × 605.05
  4. Step 4: Simplify right side
    801.88x = 669,556.15
  5. Step 5: Solve for x
    x = 669,556.15/801.88
  6. Step 6: Final answer
    x = 834.99

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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.