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Finding the Fourth Proportional to 998.84, 1,498.56 and 340.84

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Solution

The fourth proportional to 998.84, 1,498.56 and 340.84 is: 511.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.84 : 1,498.56 = 340.84 : x
  2. Step 2: Convert to fraction form
    998.84/1,498.56 = 340.84/x
  3. Step 3: Cross multiply
    998.84x = 1,498.56 × 340.84
  4. Step 4: Simplify right side
    998.84x = 510,769.19
  5. Step 5: Solve for x
    x = 510,769.19/998.84
  6. Step 6: Final answer
    x = 511.36

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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.