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Finding the Fourth Proportional to 466.43, 643.67 and 256.60

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Solution

The fourth proportional to 466.43, 643.67 and 256.60 is: 354.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.43 : 643.67 = 256.60 : x
  2. Step 2: Convert to fraction form
    466.43/643.67 = 256.60/x
  3. Step 3: Cross multiply
    466.43x = 643.67 × 256.60
  4. Step 4: Simplify right side
    466.43x = 165,165.08
  5. Step 5: Solve for x
    x = 165,165.08/466.43
  6. Step 6: Final answer
    x = 354.11

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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.