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Finding the Fourth Proportional to 644.22, 887.67 and 436.86

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Solution

The fourth proportional to 644.22, 887.67 and 436.86 is: 601.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.22 : 887.67 = 436.86 : x
  2. Step 2: Convert to fraction form
    644.22/887.67 = 436.86/x
  3. Step 3: Cross multiply
    644.22x = 887.67 × 436.86
  4. Step 4: Simplify right side
    644.22x = 387,787.52
  5. Step 5: Solve for x
    x = 387,787.52/644.22
  6. Step 6: Final answer
    x = 601.95

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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.