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Finding the Fourth Proportional to 345.91, 477.38 and 229.39

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Solution

The fourth proportional to 345.91, 477.38 and 229.39 is: 316.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.91 : 477.38 = 229.39 : x
  2. Step 2: Convert to fraction form
    345.91/477.38 = 229.39/x
  3. Step 3: Cross multiply
    345.91x = 477.38 × 229.39
  4. Step 4: Simplify right side
    345.91x = 109,506.20
  5. Step 5: Solve for x
    x = 109,506.20/345.91
  6. Step 6: Final answer
    x = 316.57

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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.