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Finding the Fourth Proportional to 464.49, 641.25 and 317.34

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Solution

The fourth proportional to 464.49, 641.25 and 317.34 is: 438.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.49 : 641.25 = 317.34 : x
  2. Step 2: Convert to fraction form
    464.49/641.25 = 317.34/x
  3. Step 3: Cross multiply
    464.49x = 641.25 × 317.34
  4. Step 4: Simplify right side
    464.49x = 203,494.28
  5. Step 5: Solve for x
    x = 203,494.28/464.49
  6. Step 6: Final answer
    x = 438.10

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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.