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Finding the Fourth Proportional to 345.89, 477.39 and 198.62

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Solution

The fourth proportional to 345.89, 477.39 and 198.62 is: 274.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.89 : 477.39 = 198.62 : x
  2. Step 2: Convert to fraction form
    345.89/477.39 = 198.62/x
  3. Step 3: Cross multiply
    345.89x = 477.39 × 198.62
  4. Step 4: Simplify right side
    345.89x = 94,819.20
  5. Step 5: Solve for x
    x = 94,819.20/345.89
  6. Step 6: Final answer
    x = 274.13

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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.