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Finding the Fourth Proportional to 639.77, 959.41 and 503.08

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Solution

The fourth proportional to 639.77, 959.41 and 503.08 is: 754.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.77 : 959.41 = 503.08 : x
  2. Step 2: Convert to fraction form
    639.77/959.41 = 503.08/x
  3. Step 3: Cross multiply
    639.77x = 959.41 × 503.08
  4. Step 4: Simplify right side
    639.77x = 482,658.21
  5. Step 5: Solve for x
    x = 482,658.21/639.77
  6. Step 6: Final answer
    x = 754.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.