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Finding the Fourth Proportional to 404.36, 606.56 and 147.80

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Solution

The fourth proportional to 404.36, 606.56 and 147.80 is: 221.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.36 : 606.56 = 147.80 : x
  2. Step 2: Convert to fraction form
    404.36/606.56 = 147.80/x
  3. Step 3: Cross multiply
    404.36x = 606.56 × 147.80
  4. Step 4: Simplify right side
    404.36x = 89,649.57
  5. Step 5: Solve for x
    x = 89,649.57/404.36
  6. Step 6: Final answer
    x = 221.71

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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.