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Finding the Fourth Proportional to 483.48, 666.98 and 306.38

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Solution

The fourth proportional to 483.48, 666.98 and 306.38 is: 422.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.48 : 666.98 = 306.38 : x
  2. Step 2: Convert to fraction form
    483.48/666.98 = 306.38/x
  3. Step 3: Cross multiply
    483.48x = 666.98 × 306.38
  4. Step 4: Simplify right side
    483.48x = 204,349.33
  5. Step 5: Solve for x
    x = 204,349.33/483.48
  6. Step 6: Final answer
    x = 422.66

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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.