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Finding the Fourth Proportional to 464.90, 641.34 and 275.81

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Solution

The fourth proportional to 464.90, 641.34 and 275.81 is: 380.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.90 : 641.34 = 275.81 : x
  2. Step 2: Convert to fraction form
    464.90/641.34 = 275.81/x
  3. Step 3: Cross multiply
    464.90x = 641.34 × 275.81
  4. Step 4: Simplify right side
    464.90x = 176,884.78
  5. Step 5: Solve for x
    x = 176,884.78/464.90
  6. Step 6: Final answer
    x = 380.48

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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.