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Finding the Fourth Proportional to 463.83, 640.61 and 401.56

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Solution

The fourth proportional to 463.83, 640.61 and 401.56 is: 554.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.83 : 640.61 = 401.56 : x
  2. Step 2: Convert to fraction form
    463.83/640.61 = 401.56/x
  3. Step 3: Cross multiply
    463.83x = 640.61 × 401.56
  4. Step 4: Simplify right side
    463.83x = 257,241.25
  5. Step 5: Solve for x
    x = 257,241.25/463.83
  6. Step 6: Final answer
    x = 554.61

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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.