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Finding the Fourth Proportional to 466.05, 642.89 and 291.09

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Solution

The fourth proportional to 466.05, 642.89 and 291.09 is: 401.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.05 : 642.89 = 291.09 : x
  2. Step 2: Convert to fraction form
    466.05/642.89 = 291.09/x
  3. Step 3: Cross multiply
    466.05x = 642.89 × 291.09
  4. Step 4: Simplify right side
    466.05x = 187,140.35
  5. Step 5: Solve for x
    x = 187,140.35/466.05
  6. Step 6: Final answer
    x = 401.54

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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.