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Finding the Fourth Proportional to 298.91, 412.52 and 186.86

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Solution

The fourth proportional to 298.91, 412.52 and 186.86 is: 257.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.91 : 412.52 = 186.86 : x
  2. Step 2: Convert to fraction form
    298.91/412.52 = 186.86/x
  3. Step 3: Cross multiply
    298.91x = 412.52 × 186.86
  4. Step 4: Simplify right side
    298.91x = 77,083.49
  5. Step 5: Solve for x
    x = 77,083.49/298.91
  6. Step 6: Final answer
    x = 257.88

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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.