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Finding the Fourth Proportional to 792.28, 1,187.07 and 618.88

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Solution

The fourth proportional to 792.28, 1,187.07 and 618.88 is: 927.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    792.28 : 1,187.07 = 618.88 : x
  2. Step 2: Convert to fraction form
    792.28/1,187.07 = 618.88/x
  3. Step 3: Cross multiply
    792.28x = 1,187.07 × 618.88
  4. Step 4: Simplify right side
    792.28x = 734,653.88
  5. Step 5: Solve for x
    x = 734,653.88/792.28
  6. Step 6: Final answer
    x = 927.27

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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.