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Finding the Fourth Proportional to 799.20, 1,101.60 and 799.20

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Solution

The fourth proportional to 799.20, 1,101.60 and 799.20 is: 1,101.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.20 : 1,101.60 = 799.20 : x
  2. Step 2: Convert to fraction form
    799.20/1,101.60 = 799.20/x
  3. Step 3: Cross multiply
    799.20x = 1,101.60 × 799.20
  4. Step 4: Simplify right side
    799.20x = 880,398.72
  5. Step 5: Solve for x
    x = 880,398.72/799.20
  6. Step 6: Final answer
    x = 1,101.60

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1.5x scale

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.