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Finding the Fourth Proportional to 793.55, 1,189.92 and 245.66

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Solution

The fourth proportional to 793.55, 1,189.92 and 245.66 is: 368.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.55 : 1,189.92 = 245.66 : x
  2. Step 2: Convert to fraction form
    793.55/1,189.92 = 245.66/x
  3. Step 3: Cross multiply
    793.55x = 1,189.92 × 245.66
  4. Step 4: Simplify right side
    793.55x = 292,315.75
  5. Step 5: Solve for x
    x = 292,315.75/793.55
  6. Step 6: Final answer
    x = 368.36

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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.