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Finding the Fourth Proportional to 816.60, 1,224.90 and 793.56

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Solution

The fourth proportional to 816.60, 1,224.90 and 793.56 is: 1,190.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.60 : 1,224.90 = 793.56 : x
  2. Step 2: Convert to fraction form
    816.60/1,224.90 = 793.56/x
  3. Step 3: Cross multiply
    816.60x = 1,224.90 × 793.56
  4. Step 4: Simplify right side
    816.60x = 972,031.64
  5. Step 5: Solve for x
    x = 972,031.64/816.60
  6. Step 6: Final answer
    x = 1,190.34

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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.