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Finding the Fourth Proportional to 466.31, 643.52 and 256.48

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Solution

The fourth proportional to 466.31, 643.52 and 256.48 is: 353.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.31 : 643.52 = 256.48 : x
  2. Step 2: Convert to fraction form
    466.31/643.52 = 256.48/x
  3. Step 3: Cross multiply
    466.31x = 643.52 × 256.48
  4. Step 4: Simplify right side
    466.31x = 165,050.34
  5. Step 5: Solve for x
    x = 165,050.34/466.31
  6. Step 6: Final answer
    x = 353.95

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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.