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Finding the Fourth Proportional to 998.39, 1,497.20 and 450.20

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Solution

The fourth proportional to 998.39, 1,497.20 and 450.20 is: 675.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.39 : 1,497.20 = 450.20 : x
  2. Step 2: Convert to fraction form
    998.39/1,497.20 = 450.20/x
  3. Step 3: Cross multiply
    998.39x = 1,497.20 × 450.20
  4. Step 4: Simplify right side
    998.39x = 674,040.93
  5. Step 5: Solve for x
    x = 674,040.93/998.39
  6. Step 6: Final answer
    x = 675.13

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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.