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Finding the Fourth Proportional to 404.05, 557.58 and 229.39

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Solution

The fourth proportional to 404.05, 557.58 and 229.39 is: 316.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.05 : 557.58 = 229.39 : x
  2. Step 2: Convert to fraction form
    404.05/557.58 = 229.39/x
  3. Step 3: Cross multiply
    404.05x = 557.58 × 229.39
  4. Step 4: Simplify right side
    404.05x = 127,903.28
  5. Step 5: Solve for x
    x = 127,903.28/404.05
  6. Step 6: Final answer
    x = 316.55

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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.