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Finding the Fourth Proportional to 640.94, 956.43 and 568.04

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Solution

The fourth proportional to 640.94, 956.43 and 568.04 is: 847.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.94 : 956.43 = 568.04 : x
  2. Step 2: Convert to fraction form
    640.94/956.43 = 568.04/x
  3. Step 3: Cross multiply
    640.94x = 956.43 × 568.04
  4. Step 4: Simplify right side
    640.94x = 543,287.66
  5. Step 5: Solve for x
    x = 543,287.66/640.94
  6. Step 6: Final answer
    x = 847.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.