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Finding the Fourth Proportional to 424.15, 636.86 and 346.30

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Solution

The fourth proportional to 424.15, 636.86 and 346.30 is: 519.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.15 : 636.86 = 346.30 : x
  2. Step 2: Convert to fraction form
    424.15/636.86 = 346.30/x
  3. Step 3: Cross multiply
    424.15x = 636.86 × 346.30
  4. Step 4: Simplify right side
    424.15x = 220,544.62
  5. Step 5: Solve for x
    x = 220,544.62/424.15
  6. Step 6: Final answer
    x = 519.97

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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.