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Finding the Fourth Proportional to 484.10, 667.55 and 287.57

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Solution

The fourth proportional to 484.10, 667.55 and 287.57 is: 396.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.10 : 667.55 = 287.57 : x
  2. Step 2: Convert to fraction form
    484.10/667.55 = 287.57/x
  3. Step 3: Cross multiply
    484.10x = 667.55 × 287.57
  4. Step 4: Simplify right side
    484.10x = 191,965.92
  5. Step 5: Solve for x
    x = 191,965.92/484.10
  6. Step 6: Final answer
    x = 396.55

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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.