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Finding the Fourth Proportional to 998.91, 1,497.08 and 690.27

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Solution

The fourth proportional to 998.91, 1,497.08 and 690.27 is: 1,034.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.91 : 1,497.08 = 690.27 : x
  2. Step 2: Convert to fraction form
    998.91/1,497.08 = 690.27/x
  3. Step 3: Cross multiply
    998.91x = 1,497.08 × 690.27
  4. Step 4: Simplify right side
    998.91x = 1,033,385.96
  5. Step 5: Solve for x
    x = 1,033,385.96/998.91
  6. Step 6: Final answer
    x = 1,034.51

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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.