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Finding the Fourth Proportional to 640.49, 960.80 and 568.04

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Solution

The fourth proportional to 640.49, 960.80 and 568.04 is: 852.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.49 : 960.80 = 568.04 : x
  2. Step 2: Convert to fraction form
    640.49/960.80 = 568.04/x
  3. Step 3: Cross multiply
    640.49x = 960.80 × 568.04
  4. Step 4: Simplify right side
    640.49x = 545,765.19
  5. Step 5: Solve for x
    x = 545,765.19/640.49
  6. Step 6: Final answer
    x = 852.11

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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.