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Finding the Fourth Proportional to 612.99, 845.91 and 351.09

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Solution

The fourth proportional to 612.99, 845.91 and 351.09 is: 484.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.99 : 845.91 = 351.09 : x
  2. Step 2: Convert to fraction form
    612.99/845.91 = 351.09/x
  3. Step 3: Cross multiply
    612.99x = 845.91 × 351.09
  4. Step 4: Simplify right side
    612.99x = 296,990.54
  5. Step 5: Solve for x
    x = 296,990.54/612.99
  6. Step 6: Final answer
    x = 484.49

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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.