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Finding the Fourth Proportional to 792.29, 1,187.93 and 330.38

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Solution

The fourth proportional to 792.29, 1,187.93 and 330.38 is: 495.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.29 : 1,187.93 = 330.38 : x
  2. Step 2: Convert to fraction form
    792.29/1,187.93 = 330.38/x
  3. Step 3: Cross multiply
    792.29x = 1,187.93 × 330.38
  4. Step 4: Simplify right side
    792.29x = 392,460.72
  5. Step 5: Solve for x
    x = 392,460.72/792.29
  6. Step 6: Final answer
    x = 495.35

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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.