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Finding the Fourth Proportional to 464.31, 640.73 and 277.70

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Solution

The fourth proportional to 464.31, 640.73 and 277.70 is: 383.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    464.31 : 640.73 = 277.70 : x
  2. Step 2: Convert to fraction form
    464.31/640.73 = 277.70/x
  3. Step 3: Cross multiply
    464.31x = 640.73 × 277.70
  4. Step 4: Simplify right side
    464.31x = 177,928.21
  5. Step 5: Solve for x
    x = 177,928.21/464.31
  6. Step 6: Final answer
    x = 383.21

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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.