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Finding the Fourth Proportional to 887.70, 1,224.92 and 625.26

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Solution

The fourth proportional to 887.70, 1,224.92 and 625.26 is: 862.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.70 : 1,224.92 = 625.26 : x
  2. Step 2: Convert to fraction form
    887.70/1,224.92 = 625.26/x
  3. Step 3: Cross multiply
    887.70x = 1,224.92 × 625.26
  4. Step 4: Simplify right side
    887.70x = 765,893.48
  5. Step 5: Solve for x
    x = 765,893.48/887.70
  6. Step 6: Final answer
    x = 862.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.