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Finding the Fourth Proportional to 640.24, 956.30 and 568.56

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Solution

The fourth proportional to 640.24, 956.30 and 568.56 is: 849.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.24 : 956.30 = 568.56 : x
  2. Step 2: Convert to fraction form
    640.24/956.30 = 568.56/x
  3. Step 3: Cross multiply
    640.24x = 956.30 × 568.56
  4. Step 4: Simplify right side
    640.24x = 543,713.93
  5. Step 5: Solve for x
    x = 543,713.93/640.24
  6. Step 6: Final answer
    x = 849.23

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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.