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Finding the Fourth Proportional to 631.30, 865.96 and 625.82

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Solution

The fourth proportional to 631.30, 865.96 and 625.82 is: 858.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.30 : 865.96 = 625.82 : x
  2. Step 2: Convert to fraction form
    631.30/865.96 = 625.82/x
  3. Step 3: Cross multiply
    631.30x = 865.96 × 625.82
  4. Step 4: Simplify right side
    631.30x = 541,935.09
  5. Step 5: Solve for x
    x = 541,935.09/631.30
  6. Step 6: Final answer
    x = 858.44

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.