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Finding the Fourth Proportional to 626.25, 938.35 and 215.16

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Solution

The fourth proportional to 626.25, 938.35 and 215.16 is: 322.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.25 : 938.35 = 215.16 : x
  2. Step 2: Convert to fraction form
    626.25/938.35 = 215.16/x
  3. Step 3: Cross multiply
    626.25x = 938.35 × 215.16
  4. Step 4: Simplify right side
    626.25x = 201,898.37
  5. Step 5: Solve for x
    x = 201,898.37/626.25
  6. Step 6: Final answer
    x = 322.39

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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.