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Finding the Fourth Proportional to 625.93, 938.91 and 215.06

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Solution

The fourth proportional to 625.93, 938.91 and 215.06 is: 322.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.93 : 938.91 = 215.06 : x
  2. Step 2: Convert to fraction form
    625.93/938.91 = 215.06/x
  3. Step 3: Cross multiply
    625.93x = 938.91 × 215.06
  4. Step 4: Simplify right side
    625.93x = 201,921.98
  5. Step 5: Solve for x
    x = 201,921.98/625.93
  6. Step 6: Final answer
    x = 322.60

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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.