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Finding the Fourth Proportional to 229.60, 342.62 and 209.16

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Solution

The fourth proportional to 229.60, 342.62 and 209.16 is: 312.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.60 : 342.62 = 209.16 : x
  2. Step 2: Convert to fraction form
    229.60/342.62 = 209.16/x
  3. Step 3: Cross multiply
    229.60x = 342.62 × 209.16
  4. Step 4: Simplify right side
    229.60x = 71,662.40
  5. Step 5: Solve for x
    x = 71,662.40/229.60
  6. Step 6: Final answer
    x = 312.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.