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Finding the Fourth Proportional to 466.90, 644.30 and 257.06

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Solution

The fourth proportional to 466.90, 644.30 and 257.06 is: 354.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.90 : 644.30 = 257.06 : x
  2. Step 2: Convert to fraction form
    466.90/644.30 = 257.06/x
  3. Step 3: Cross multiply
    466.90x = 644.30 × 257.06
  4. Step 4: Simplify right side
    466.90x = 165,623.76
  5. Step 5: Solve for x
    x = 165,623.76/466.90
  6. Step 6: Final answer
    x = 354.73

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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.