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Finding the Fourth Proportional to 298.32, 411.72 and 211.32

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Solution

The fourth proportional to 298.32, 411.72 and 211.32 is: 291.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.32 : 411.72 = 211.32 : x
  2. Step 2: Convert to fraction form
    298.32/411.72 = 211.32/x
  3. Step 3: Cross multiply
    298.32x = 411.72 × 211.32
  4. Step 4: Simplify right side
    298.32x = 87,004.67
  5. Step 5: Solve for x
    x = 87,004.67/298.32
  6. Step 6: Final answer
    x = 291.65

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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.