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Finding the Fourth Proportional to 403.99, 557.56 and 229.37

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Solution

The fourth proportional to 403.99, 557.56 and 229.37 is: 316.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.99 : 557.56 = 229.37 : x
  2. Step 2: Convert to fraction form
    403.99/557.56 = 229.37/x
  3. Step 3: Cross multiply
    403.99x = 557.56 × 229.37
  4. Step 4: Simplify right side
    403.99x = 127,887.54
  5. Step 5: Solve for x
    x = 127,887.54/403.99
  6. Step 6: Final answer
    x = 316.56

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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.