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Finding the Fourth Proportional to 451.39, 623.13 and 351.61

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Solution

The fourth proportional to 451.39, 623.13 and 351.61 is: 485.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.39 : 623.13 = 351.61 : x
  2. Step 2: Convert to fraction form
    451.39/623.13 = 351.61/x
  3. Step 3: Cross multiply
    451.39x = 623.13 × 351.61
  4. Step 4: Simplify right side
    451.39x = 219,095.62
  5. Step 5: Solve for x
    x = 219,095.62/451.39
  6. Step 6: Final answer
    x = 485.39

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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.