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Finding the Fourth Proportional to 640.68, 959.55 and 566.79

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Solution

The fourth proportional to 640.68, 959.55 and 566.79 is: 848.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.68 : 959.55 = 566.79 : x
  2. Step 2: Convert to fraction form
    640.68/959.55 = 566.79/x
  3. Step 3: Cross multiply
    640.68x = 959.55 × 566.79
  4. Step 4: Simplify right side
    640.68x = 543,863.34
  5. Step 5: Solve for x
    x = 543,863.34/640.68
  6. Step 6: Final answer
    x = 848.88

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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.