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Finding the Fourth Proportional to 800.45, 1,201.59 and 747.60

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Solution

The fourth proportional to 800.45, 1,201.59 and 747.60 is: 1,122.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.45 : 1,201.59 = 747.60 : x
  2. Step 2: Convert to fraction form
    800.45/1,201.59 = 747.60/x
  3. Step 3: Cross multiply
    800.45x = 1,201.59 × 747.60
  4. Step 4: Simplify right side
    800.45x = 898,308.68
  5. Step 5: Solve for x
    x = 898,308.68/800.45
  6. Step 6: Final answer
    x = 1,122.25

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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.