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Finding the Fourth Proportional to 298.49, 447.80 and 208.04

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Solution

The fourth proportional to 298.49, 447.80 and 208.04 is: 312.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.49 : 447.80 = 208.04 : x
  2. Step 2: Convert to fraction form
    298.49/447.80 = 208.04/x
  3. Step 3: Cross multiply
    298.49x = 447.80 × 208.04
  4. Step 4: Simplify right side
    298.49x = 93,157.03
  5. Step 5: Solve for x
    x = 93,157.03/298.49
  6. Step 6: Final answer
    x = 312.10

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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.