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Finding the Fourth Proportional to 638.39, 956.23 and 464.22

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Solution

The fourth proportional to 638.39, 956.23 and 464.22 is: 695.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.39 : 956.23 = 464.22 : x
  2. Step 2: Convert to fraction form
    638.39/956.23 = 464.22/x
  3. Step 3: Cross multiply
    638.39x = 956.23 × 464.22
  4. Step 4: Simplify right side
    638.39x = 443,899.93
  5. Step 5: Solve for x
    x = 443,899.93/638.39
  6. Step 6: Final answer
    x = 695.34

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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.