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Finding the Fourth Proportional to 298.64, 447.92 and 170.40

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Solution

The fourth proportional to 298.64, 447.92 and 170.40 is: 255.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.64 : 447.92 = 170.40 : x
  2. Step 2: Convert to fraction form
    298.64/447.92 = 170.40/x
  3. Step 3: Cross multiply
    298.64x = 447.92 × 170.40
  4. Step 4: Simplify right side
    298.64x = 76,325.57
  5. Step 5: Solve for x
    x = 76,325.57/298.64
  6. Step 6: Final answer
    x = 255.58

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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.