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Finding the Fourth Proportional to 792.52, 1,188.79 and 330.30

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Solution

The fourth proportional to 792.52, 1,188.79 and 330.30 is: 495.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.52 : 1,188.79 = 330.30 : x
  2. Step 2: Convert to fraction form
    792.52/1,188.79 = 330.30/x
  3. Step 3: Cross multiply
    792.52x = 1,188.79 × 330.30
  4. Step 4: Simplify right side
    792.52x = 392,656.51
  5. Step 5: Solve for x
    x = 392,656.51/792.52
  6. Step 6: Final answer
    x = 495.45

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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.