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Finding the Fourth Proportional to 639.90, 959.24 and 582.83

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Solution

The fourth proportional to 639.90, 959.24 and 582.83 is: 873.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.90 : 959.24 = 582.83 : x
  2. Step 2: Convert to fraction form
    639.90/959.24 = 582.83/x
  3. Step 3: Cross multiply
    639.90x = 959.24 × 582.83
  4. Step 4: Simplify right side
    639.90x = 559,074.11
  5. Step 5: Solve for x
    x = 559,074.11/639.90
  6. Step 6: Final answer
    x = 873.69

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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.