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Finding the Fourth Proportional to 639.01, 956.49 and 523.18

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Solution

The fourth proportional to 639.01, 956.49 and 523.18 is: 783.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.01 : 956.49 = 523.18 : x
  2. Step 2: Convert to fraction form
    639.01/956.49 = 523.18/x
  3. Step 3: Cross multiply
    639.01x = 956.49 × 523.18
  4. Step 4: Simplify right side
    639.01x = 500,416.44
  5. Step 5: Solve for x
    x = 500,416.44/639.01
  6. Step 6: Final answer
    x = 783.11

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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.