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Finding the Fourth Proportional to 298.90, 412.51 and 174.55

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Solution

The fourth proportional to 298.90, 412.51 and 174.55 is: 240.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.90 : 412.51 = 174.55 : x
  2. Step 2: Convert to fraction form
    298.90/412.51 = 174.55/x
  3. Step 3: Cross multiply
    298.90x = 412.51 × 174.55
  4. Step 4: Simplify right side
    298.90x = 72,003.62
  5. Step 5: Solve for x
    x = 72,003.62/298.90
  6. Step 6: Final answer
    x = 240.90

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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.