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Finding the Fourth Proportional to 998.29, 1,495.65 and 608.09

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Solution

The fourth proportional to 998.29, 1,495.65 and 608.09 is: 911.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.29 : 1,495.65 = 608.09 : x
  2. Step 2: Convert to fraction form
    998.29/1,495.65 = 608.09/x
  3. Step 3: Cross multiply
    998.29x = 1,495.65 × 608.09
  4. Step 4: Simplify right side
    998.29x = 909,489.81
  5. Step 5: Solve for x
    x = 909,489.81/998.29
  6. Step 6: Final answer
    x = 911.05

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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.