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Finding the Fourth Proportional to 623.39, 860.12 and 396.19

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Solution

The fourth proportional to 623.39, 860.12 and 396.19 is: 546.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.39 : 860.12 = 396.19 : x
  2. Step 2: Convert to fraction form
    623.39/860.12 = 396.19/x
  3. Step 3: Cross multiply
    623.39x = 860.12 × 396.19
  4. Step 4: Simplify right side
    623.39x = 340,766.15
  5. Step 5: Solve for x
    x = 340,766.15/623.39
  6. Step 6: Final answer
    x = 546.63

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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.