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Finding the Fourth Proportional to 484.98, 666.66 and 396.30

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Solution

The fourth proportional to 484.98, 666.66 and 396.30 is: 544.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.98 : 666.66 = 396.30 : x
  2. Step 2: Convert to fraction form
    484.98/666.66 = 396.30/x
  3. Step 3: Cross multiply
    484.98x = 666.66 × 396.30
  4. Step 4: Simplify right side
    484.98x = 264,197.36
  5. Step 5: Solve for x
    x = 264,197.36/484.98
  6. Step 6: Final answer
    x = 544.76

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.