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Finding the Fourth Proportional to 998.96, 1,497.48 and 451.20

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Solution

The fourth proportional to 998.96, 1,497.48 and 451.20 is: 676.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.96 : 1,497.48 = 451.20 : x
  2. Step 2: Convert to fraction form
    998.96/1,497.48 = 451.20/x
  3. Step 3: Cross multiply
    998.96x = 1,497.48 × 451.20
  4. Step 4: Simplify right side
    998.96x = 675,662.98
  5. Step 5: Solve for x
    x = 675,662.98/998.96
  6. Step 6: Final answer
    x = 676.37

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1.5x scale

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.