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Finding the Fourth Proportional to 626.58, 939.98 and 215.61

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Solution

The fourth proportional to 626.58, 939.98 and 215.61 is: 323.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.58 : 939.98 = 215.61 : x
  2. Step 2: Convert to fraction form
    626.58/939.98 = 215.61/x
  3. Step 3: Cross multiply
    626.58x = 939.98 × 215.61
  4. Step 4: Simplify right side
    626.58x = 202,669.09
  5. Step 5: Solve for x
    x = 202,669.09/626.58
  6. Step 6: Final answer
    x = 323.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.