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Finding the Fourth Proportional to 464.84, 641.38 and 278.44

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Solution

The fourth proportional to 464.84, 641.38 and 278.44 is: 384.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.84 : 641.38 = 278.44 : x
  2. Step 2: Convert to fraction form
    464.84/641.38 = 278.44/x
  3. Step 3: Cross multiply
    464.84x = 641.38 × 278.44
  4. Step 4: Simplify right side
    464.84x = 178,585.85
  5. Step 5: Solve for x
    x = 178,585.85/464.84
  6. Step 6: Final answer
    x = 384.19

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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.