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Finding the Fourth Proportional to 887.37, 1,224.98 and 639.92

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Solution

The fourth proportional to 887.37, 1,224.98 and 639.92 is: 883.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.37 : 1,224.98 = 639.92 : x
  2. Step 2: Convert to fraction form
    887.37/1,224.98 = 639.92/x
  3. Step 3: Cross multiply
    887.37x = 1,224.98 × 639.92
  4. Step 4: Simplify right side
    887.37x = 783,879.88
  5. Step 5: Solve for x
    x = 783,879.88/887.37
  6. Step 6: Final answer
    x = 883.37

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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.