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Finding the Fourth Proportional to 998.96, 1,498 and 451.12

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Solution

The fourth proportional to 998.96, 1,498 and 451.12 is: 676.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.96 : 1,498 = 451.12 : x
  2. Step 2: Convert to fraction form
    998.96/1,498 = 451.12/x
  3. Step 3: Cross multiply
    998.96x = 1,498 × 451.12
  4. Step 4: Simplify right side
    998.96x = 675,777.76
  5. Step 5: Solve for x
    x = 675,777.76/998.96
  6. Step 6: Final answer
    x = 676.48

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.