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Finding the Fourth Proportional to 464.62, 641.56 and 317.74

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Solution

The fourth proportional to 464.62, 641.56 and 317.74 is: 438.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.62 : 641.56 = 317.74 : x
  2. Step 2: Convert to fraction form
    464.62/641.56 = 317.74/x
  3. Step 3: Cross multiply
    464.62x = 641.56 × 317.74
  4. Step 4: Simplify right side
    464.62x = 203,849.27
  5. Step 5: Solve for x
    x = 203,849.27/464.62
  6. Step 6: Final answer
    x = 438.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.