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Finding the Fourth Proportional to 927.44, 1,279.74 and 788.12

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Solution

The fourth proportional to 927.44, 1,279.74 and 788.12 is: 1,087.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.44 : 1,279.74 = 788.12 : x
  2. Step 2: Convert to fraction form
    927.44/1,279.74 = 788.12/x
  3. Step 3: Cross multiply
    927.44x = 1,279.74 × 788.12
  4. Step 4: Simplify right side
    927.44x = 1,008,588.69
  5. Step 5: Solve for x
    x = 1,008,588.69/927.44
  6. Step 6: Final answer
    x = 1,087.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.