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Finding the Fourth Proportional to 466.16, 643.26 and 291.44

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Solution

The fourth proportional to 466.16, 643.26 and 291.44 is: 402.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.16 : 643.26 = 291.44 : x
  2. Step 2: Convert to fraction form
    466.16/643.26 = 291.44/x
  3. Step 3: Cross multiply
    466.16x = 643.26 × 291.44
  4. Step 4: Simplify right side
    466.16x = 187,471.69
  5. Step 5: Solve for x
    x = 187,471.69/466.16
  6. Step 6: Final answer
    x = 402.16

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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.