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Finding the Fourth Proportional to 644.28, 888.49 and 468.39

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Solution

The fourth proportional to 644.28, 888.49 and 468.39 is: 645.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.28 : 888.49 = 468.39 : x
  2. Step 2: Convert to fraction form
    644.28/888.49 = 468.39/x
  3. Step 3: Cross multiply
    644.28x = 888.49 × 468.39
  4. Step 4: Simplify right side
    644.28x = 416,159.83
  5. Step 5: Solve for x
    x = 416,159.83/644.28
  6. Step 6: Final answer
    x = 645.93

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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.