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Finding the Fourth Proportional to 799.20, 1,101.60 and 651.60

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Solution

The fourth proportional to 799.20, 1,101.60 and 651.60 is: 898.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.20 : 1,101.60 = 651.60 : x
  2. Step 2: Convert to fraction form
    799.20/1,101.60 = 651.60/x
  3. Step 3: Cross multiply
    799.20x = 1,101.60 × 651.60
  4. Step 4: Simplify right side
    799.20x = 717,802.56
  5. Step 5: Solve for x
    x = 717,802.56/799.20
  6. Step 6: Final answer
    x = 898.15

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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.