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Finding the Fourth Proportional to 792.79, 1,189.49 and 245.16

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Solution

The fourth proportional to 792.79, 1,189.49 and 245.16 is: 367.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.79 : 1,189.49 = 245.16 : x
  2. Step 2: Convert to fraction form
    792.79/1,189.49 = 245.16/x
  3. Step 3: Cross multiply
    792.79x = 1,189.49 × 245.16
  4. Step 4: Simplify right side
    792.79x = 291,614.14
  5. Step 5: Solve for x
    x = 291,614.14/792.79
  6. Step 6: Final answer
    x = 367.83

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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.