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Finding the Fourth Proportional to 404.08, 606.60 and 211.84

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Solution

The fourth proportional to 404.08, 606.60 and 211.84 is: 318.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.08 : 606.60 = 211.84 : x
  2. Step 2: Convert to fraction form
    404.08/606.60 = 211.84/x
  3. Step 3: Cross multiply
    404.08x = 606.60 × 211.84
  4. Step 4: Simplify right side
    404.08x = 128,502.14
  5. Step 5: Solve for x
    x = 128,502.14/404.08
  6. Step 6: Final answer
    x = 318.01

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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.