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Finding the Fourth Proportional to 641.72, 962.62 and 504.56

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Solution

The fourth proportional to 641.72, 962.62 and 504.56 is: 756.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.72 : 962.62 = 504.56 : x
  2. Step 2: Convert to fraction form
    641.72/962.62 = 504.56/x
  3. Step 3: Cross multiply
    641.72x = 962.62 × 504.56
  4. Step 4: Simplify right side
    641.72x = 485,700.69
  5. Step 5: Solve for x
    x = 485,700.69/641.72
  6. Step 6: Final answer
    x = 756.87

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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.