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Finding the Fourth Proportional to 300.86, 415.45 and 202.91

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Solution

The fourth proportional to 300.86, 415.45 and 202.91 is: 280.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.86 : 415.45 = 202.91 : x
  2. Step 2: Convert to fraction form
    300.86/415.45 = 202.91/x
  3. Step 3: Cross multiply
    300.86x = 415.45 × 202.91
  4. Step 4: Simplify right side
    300.86x = 84,297.71
  5. Step 5: Solve for x
    x = 84,297.71/300.86
  6. Step 6: Final answer
    x = 280.19

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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.