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Finding the Fourth Proportional to 639.10, 880.96 and 534.54

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Solution

The fourth proportional to 639.10, 880.96 and 534.54 is: 736.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.10 : 880.96 = 534.54 : x
  2. Step 2: Convert to fraction form
    639.10/880.96 = 534.54/x
  3. Step 3: Cross multiply
    639.10x = 880.96 × 534.54
  4. Step 4: Simplify right side
    639.10x = 470,908.36
  5. Step 5: Solve for x
    x = 470,908.36/639.10
  6. Step 6: Final answer
    x = 736.83

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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.