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Finding the Fourth Proportional to 998.46, 1,498.10 and 511.25

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Solution

The fourth proportional to 998.46, 1,498.10 and 511.25 is: 767.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.46 : 1,498.10 = 511.25 : x
  2. Step 2: Convert to fraction form
    998.46/1,498.10 = 511.25/x
  3. Step 3: Cross multiply
    998.46x = 1,498.10 × 511.25
  4. Step 4: Simplify right side
    998.46x = 765,893.58
  5. Step 5: Solve for x
    x = 765,893.58/998.46
  6. Step 6: Final answer
    x = 767.07

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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.