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Finding the Fourth Proportional to 640.06, 958.46 and 395.84

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Solution

The fourth proportional to 640.06, 958.46 and 395.84 is: 592.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.06 : 958.46 = 395.84 : x
  2. Step 2: Convert to fraction form
    640.06/958.46 = 395.84/x
  3. Step 3: Cross multiply
    640.06x = 958.46 × 395.84
  4. Step 4: Simplify right side
    640.06x = 379,396.81
  5. Step 5: Solve for x
    x = 379,396.81/640.06
  6. Step 6: Final answer
    x = 592.75

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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.