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Finding the Fourth Proportional to 298.65, 412.11 and 174.39

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Solution

The fourth proportional to 298.65, 412.11 and 174.39 is: 240.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.65 : 412.11 = 174.39 : x
  2. Step 2: Convert to fraction form
    298.65/412.11 = 174.39/x
  3. Step 3: Cross multiply
    298.65x = 412.11 × 174.39
  4. Step 4: Simplify right side
    298.65x = 71,867.86
  5. Step 5: Solve for x
    x = 71,867.86/298.65
  6. Step 6: Final answer
    x = 240.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.