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Finding the Fourth Proportional to 339.47, 468.58 and 225.88

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Solution

The fourth proportional to 339.47, 468.58 and 225.88 is: 311.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.47 : 468.58 = 225.88 : x
  2. Step 2: Convert to fraction form
    339.47/468.58 = 225.88/x
  3. Step 3: Cross multiply
    339.47x = 468.58 × 225.88
  4. Step 4: Simplify right side
    339.47x = 105,841.11
  5. Step 5: Solve for x
    x = 105,841.11/339.47
  6. Step 6: Final answer
    x = 311.79

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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.