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Finding the Fourth Proportional to 998.87, 1,498.48 and 305.52

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Solution

The fourth proportional to 998.87, 1,498.48 and 305.52 is: 458.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.87 : 1,498.48 = 305.52 : x
  2. Step 2: Convert to fraction form
    998.87/1,498.48 = 305.52/x
  3. Step 3: Cross multiply
    998.87x = 1,498.48 × 305.52
  4. Step 4: Simplify right side
    998.87x = 457,817.66
  5. Step 5: Solve for x
    x = 457,817.66/998.87
  6. Step 6: Final answer
    x = 458.34

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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.