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Finding the Fourth Proportional to 463.99, 640.19 and 277.40

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Solution

The fourth proportional to 463.99, 640.19 and 277.40 is: 382.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.99 : 640.19 = 277.40 : x
  2. Step 2: Convert to fraction form
    463.99/640.19 = 277.40/x
  3. Step 3: Cross multiply
    463.99x = 640.19 × 277.40
  4. Step 4: Simplify right side
    463.99x = 177,584.12
  5. Step 5: Solve for x
    x = 177,584.12/463.99
  6. Step 6: Final answer
    x = 382.73

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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.