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Finding the Fourth Proportional to 229.88, 315.94 and 223.40

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Solution

The fourth proportional to 229.88, 315.94 and 223.40 is: 307.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.88 : 315.94 = 223.40 : x
  2. Step 2: Convert to fraction form
    229.88/315.94 = 223.40/x
  3. Step 3: Cross multiply
    229.88x = 315.94 × 223.40
  4. Step 4: Simplify right side
    229.88x = 70,581.00
  5. Step 5: Solve for x
    x = 70,581.00/229.88
  6. Step 6: Final answer
    x = 307.03

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.