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Finding the Fourth Proportional to 623.92, 860.46 and 458.11

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Solution

The fourth proportional to 623.92, 860.46 and 458.11 is: 631.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.92 : 860.46 = 458.11 : x
  2. Step 2: Convert to fraction form
    623.92/860.46 = 458.11/x
  3. Step 3: Cross multiply
    623.92x = 860.46 × 458.11
  4. Step 4: Simplify right side
    623.92x = 394,185.33
  5. Step 5: Solve for x
    x = 394,185.33/623.92
  6. Step 6: Final answer
    x = 631.79

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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.