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Finding the Fourth Proportional to 927.25, 1,386.92 and 680.60

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Solution

The fourth proportional to 927.25, 1,386.92 and 680.60 is: 1,018.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.25 : 1,386.92 = 680.60 : x
  2. Step 2: Convert to fraction form
    927.25/1,386.92 = 680.60/x
  3. Step 3: Cross multiply
    927.25x = 1,386.92 × 680.60
  4. Step 4: Simplify right side
    927.25x = 943,942.92
  5. Step 5: Solve for x
    x = 943,942.92/927.25
  6. Step 6: Final answer
    x = 1,018.01

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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.