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Finding the Fourth Proportional to 484.16, 667.90 and 287.60

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Solution

The fourth proportional to 484.16, 667.90 and 287.60 is: 396.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.16 : 667.90 = 287.60 : x
  2. Step 2: Convert to fraction form
    484.16/667.90 = 287.60/x
  3. Step 3: Cross multiply
    484.16x = 667.90 × 287.60
  4. Step 4: Simplify right side
    484.16x = 192,088.04
  5. Step 5: Solve for x
    x = 192,088.04/484.16
  6. Step 6: Final answer
    x = 396.74

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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.