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Finding the Fourth Proportional to 623.35, 860.28 and 343.61

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Solution

The fourth proportional to 623.35, 860.28 and 343.61 is: 474.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.35 : 860.28 = 343.61 : x
  2. Step 2: Convert to fraction form
    623.35/860.28 = 343.61/x
  3. Step 3: Cross multiply
    623.35x = 860.28 × 343.61
  4. Step 4: Simplify right side
    623.35x = 295,601.86
  5. Step 5: Solve for x
    x = 295,601.86/623.35
  6. Step 6: Final answer
    x = 474.21

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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.