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Finding the Fourth Proportional to 793.69, 1,191.21 and 307.08

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Solution

The fourth proportional to 793.69, 1,191.21 and 307.08 is: 460.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.69 : 1,191.21 = 307.08 : x
  2. Step 2: Convert to fraction form
    793.69/1,191.21 = 307.08/x
  3. Step 3: Cross multiply
    793.69x = 1,191.21 × 307.08
  4. Step 4: Simplify right side
    793.69x = 365,799.74
  5. Step 5: Solve for x
    x = 365,799.74/793.69
  6. Step 6: Final answer
    x = 460.88

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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.