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Finding the Fourth Proportional to 801.90, 1,210.55 and 793.80

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Solution

The fourth proportional to 801.90, 1,210.55 and 793.80 is: 1,198.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.90 : 1,210.55 = 793.80 : x
  2. Step 2: Convert to fraction form
    801.90/1,210.55 = 793.80/x
  3. Step 3: Cross multiply
    801.90x = 1,210.55 × 793.80
  4. Step 4: Simplify right side
    801.90x = 960,930.62
  5. Step 5: Solve for x
    x = 960,930.62/801.90
  6. Step 6: Final answer
    x = 1,198.32

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.