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Finding the Fourth Proportional to 625.43, 936.09 and 557.09

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Solution

The fourth proportional to 625.43, 936.09 and 557.09 is: 833.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.43 : 936.09 = 557.09 : x
  2. Step 2: Convert to fraction form
    625.43/936.09 = 557.09/x
  3. Step 3: Cross multiply
    625.43x = 936.09 × 557.09
  4. Step 4: Simplify right side
    625.43x = 521,486.38
  5. Step 5: Solve for x
    x = 521,486.38/625.43
  6. Step 6: Final answer
    x = 833.80

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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.