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Finding the Fourth Proportional to 639.26, 959.70 and 596.20

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Solution

The fourth proportional to 639.26, 959.70 and 596.20 is: 895.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.26 : 959.70 = 596.20 : x
  2. Step 2: Convert to fraction form
    639.26/959.70 = 596.20/x
  3. Step 3: Cross multiply
    639.26x = 959.70 × 596.20
  4. Step 4: Simplify right side
    639.26x = 572,173.14
  5. Step 5: Solve for x
    x = 572,173.14/639.26
  6. Step 6: Final answer
    x = 895.06

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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.