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Finding the Fourth Proportional to 662.19, 908.01 and 639.01

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Solution

The fourth proportional to 662.19, 908.01 and 639.01 is: 876.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.19 : 908.01 = 639.01 : x
  2. Step 2: Convert to fraction form
    662.19/908.01 = 639.01/x
  3. Step 3: Cross multiply
    662.19x = 908.01 × 639.01
  4. Step 4: Simplify right side
    662.19x = 580,227.47
  5. Step 5: Solve for x
    x = 580,227.47/662.19
  6. Step 6: Final answer
    x = 876.23

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.