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Finding the Fourth Proportional to 889.88, 1,226.85 and 680.18

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Solution

The fourth proportional to 889.88, 1,226.85 and 680.18 is: 937.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.88 : 1,226.85 = 680.18 : x
  2. Step 2: Convert to fraction form
    889.88/1,226.85 = 680.18/x
  3. Step 3: Cross multiply
    889.88x = 1,226.85 × 680.18
  4. Step 4: Simplify right side
    889.88x = 834,478.83
  5. Step 5: Solve for x
    x = 834,478.83/889.88
  6. Step 6: Final answer
    x = 937.74

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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.