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Finding the Fourth Proportional to 466.98, 644.40 and 257.15

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Solution

The fourth proportional to 466.98, 644.40 and 257.15 is: 354.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.98 : 644.40 = 257.15 : x
  2. Step 2: Convert to fraction form
    466.98/644.40 = 257.15/x
  3. Step 3: Cross multiply
    466.98x = 644.40 × 257.15
  4. Step 4: Simplify right side
    466.98x = 165,704.24
  5. Step 5: Solve for x
    x = 165,704.24/466.98
  6. Step 6: Final answer
    x = 354.84

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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.