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Finding the Fourth Proportional to 998.93, 1,498.62 and 305.61

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Solution

The fourth proportional to 998.93, 1,498.62 and 305.61 is: 458.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.93 : 1,498.62 = 305.61 : x
  2. Step 2: Convert to fraction form
    998.93/1,498.62 = 305.61/x
  3. Step 3: Cross multiply
    998.93x = 1,498.62 × 305.61
  4. Step 4: Simplify right side
    998.93x = 457,984.24
  5. Step 5: Solve for x
    x = 457,984.24/998.93
  6. Step 6: Final answer
    x = 458.47

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Double scale
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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.