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Finding the Fourth Proportional to 640.62, 955.76 and 571.37

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Solution

The fourth proportional to 640.62, 955.76 and 571.37 is: 852.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.62 : 955.76 = 571.37 : x
  2. Step 2: Convert to fraction form
    640.62/955.76 = 571.37/x
  3. Step 3: Cross multiply
    640.62x = 955.76 × 571.37
  4. Step 4: Simplify right side
    640.62x = 546,084.96
  5. Step 5: Solve for x
    x = 546,084.96/640.62
  6. Step 6: Final answer
    x = 852.43

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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.