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Finding the Fourth Proportional to 998.12, 1,497.35 and 608.42

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Solution

The fourth proportional to 998.12, 1,497.35 and 608.42 is: 912.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.12 : 1,497.35 = 608.42 : x
  2. Step 2: Convert to fraction form
    998.12/1,497.35 = 608.42/x
  3. Step 3: Cross multiply
    998.12x = 1,497.35 × 608.42
  4. Step 4: Simplify right side
    998.12x = 911,007.16
  5. Step 5: Solve for x
    x = 911,007.16/998.12
  6. Step 6: Final answer
    x = 912.73

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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.