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Finding the Fourth Proportional to 403.83, 557.36 and 229.18

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Solution

The fourth proportional to 403.83, 557.36 and 229.18 is: 316.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.83 : 557.36 = 229.18 : x
  2. Step 2: Convert to fraction form
    403.83/557.36 = 229.18/x
  3. Step 3: Cross multiply
    403.83x = 557.36 × 229.18
  4. Step 4: Simplify right side
    403.83x = 127,735.76
  5. Step 5: Solve for x
    x = 127,735.76/403.83
  6. Step 6: Final answer
    x = 316.31

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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.