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Finding the Fourth Proportional to 889.25, 1,226.21 and 679.46

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Solution

The fourth proportional to 889.25, 1,226.21 and 679.46 is: 936.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.25 : 1,226.21 = 679.46 : x
  2. Step 2: Convert to fraction form
    889.25/1,226.21 = 679.46/x
  3. Step 3: Cross multiply
    889.25x = 1,226.21 × 679.46
  4. Step 4: Simplify right side
    889.25x = 833,151.12
  5. Step 5: Solve for x
    x = 833,151.12/889.25
  6. Step 6: Final answer
    x = 936.92

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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.