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Finding the Fourth Proportional to 793.20, 1,189.99 and 245.35

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Solution

The fourth proportional to 793.20, 1,189.99 and 245.35 is: 368.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.20 : 1,189.99 = 245.35 : x
  2. Step 2: Convert to fraction form
    793.20/1,189.99 = 245.35/x
  3. Step 3: Cross multiply
    793.20x = 1,189.99 × 245.35
  4. Step 4: Simplify right side
    793.20x = 291,964.05
  5. Step 5: Solve for x
    x = 291,964.05/793.20
  6. Step 6: Final answer
    x = 368.08

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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.