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Finding the Fourth Proportional to 229.60, 344.40 and 213.40

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Solution

The fourth proportional to 229.60, 344.40 and 213.40 is: 320.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.60 : 344.40 = 213.40 : x
  2. Step 2: Convert to fraction form
    229.60/344.40 = 213.40/x
  3. Step 3: Cross multiply
    229.60x = 344.40 × 213.40
  4. Step 4: Simplify right side
    229.60x = 73,494.96
  5. Step 5: Solve for x
    x = 73,494.96/229.60
  6. Step 6: Final answer
    x = 320.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.