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Finding the Fourth Proportional to 404.02, 557.49 and 229.35

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Solution

The fourth proportional to 404.02, 557.49 and 229.35 is: 316.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.02 : 557.49 = 229.35 : x
  2. Step 2: Convert to fraction form
    404.02/557.49 = 229.35/x
  3. Step 3: Cross multiply
    404.02x = 557.49 × 229.35
  4. Step 4: Simplify right side
    404.02x = 127,860.33
  5. Step 5: Solve for x
    x = 127,860.33/404.02
  6. Step 6: Final answer
    x = 316.47

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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.