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Finding the Fourth Proportional to 298.17, 446.91 and 151.78

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Solution

The fourth proportional to 298.17, 446.91 and 151.78 is: 227.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.17 : 446.91 = 151.78 : x
  2. Step 2: Convert to fraction form
    298.17/446.91 = 151.78/x
  3. Step 3: Cross multiply
    298.17x = 446.91 × 151.78
  4. Step 4: Simplify right side
    298.17x = 67,832.00
  5. Step 5: Solve for x
    x = 67,832.00/298.17
  6. Step 6: Final answer
    x = 227.49

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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.