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Finding the Fourth Proportional to 998.19, 1,495.96 and 766.19

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Solution

The fourth proportional to 998.19, 1,495.96 and 766.19 is: 1,148.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.19 : 1,495.96 = 766.19 : x
  2. Step 2: Convert to fraction form
    998.19/1,495.96 = 766.19/x
  3. Step 3: Cross multiply
    998.19x = 1,495.96 × 766.19
  4. Step 4: Simplify right side
    998.19x = 1,146,189.59
  5. Step 5: Solve for x
    x = 1,146,189.59/998.19
  6. Step 6: Final answer
    x = 1,148.27

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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.