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Finding the Fourth Proportional to 908.89, 1,254.97 and 698.74

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Solution

The fourth proportional to 908.89, 1,254.97 and 698.74 is: 964.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.89 : 1,254.97 = 698.74 : x
  2. Step 2: Convert to fraction form
    908.89/1,254.97 = 698.74/x
  3. Step 3: Cross multiply
    908.89x = 1,254.97 × 698.74
  4. Step 4: Simplify right side
    908.89x = 876,889.72
  5. Step 5: Solve for x
    x = 876,889.72/908.89
  6. Step 6: Final answer
    x = 964.80

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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.