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Finding the Fourth Proportional to 664.02, 994.17 and 521.88

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Solution

The fourth proportional to 664.02, 994.17 and 521.88 is: 781.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.02 : 994.17 = 521.88 : x
  2. Step 2: Convert to fraction form
    664.02/994.17 = 521.88/x
  3. Step 3: Cross multiply
    664.02x = 994.17 × 521.88
  4. Step 4: Simplify right side
    664.02x = 518,837.44
  5. Step 5: Solve for x
    x = 518,837.44/664.02
  6. Step 6: Final answer
    x = 781.36

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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.