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Finding the Fourth Proportional to 625.68, 938.74 and 279.26

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Solution

The fourth proportional to 625.68, 938.74 and 279.26 is: 418.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.68 : 938.74 = 279.26 : x
  2. Step 2: Convert to fraction form
    625.68/938.74 = 279.26/x
  3. Step 3: Cross multiply
    625.68x = 938.74 × 279.26
  4. Step 4: Simplify right side
    625.68x = 262,152.53
  5. Step 5: Solve for x
    x = 262,152.53/625.68
  6. Step 6: Final answer
    x = 418.99

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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.