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Finding the Fourth Proportional to 466.40, 644.52 and 355.76

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Solution

The fourth proportional to 466.40, 644.52 and 355.76 is: 491.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.40 : 644.52 = 355.76 : x
  2. Step 2: Convert to fraction form
    466.40/644.52 = 355.76/x
  3. Step 3: Cross multiply
    466.40x = 644.52 × 355.76
  4. Step 4: Simplify right side
    466.40x = 229,294.44
  5. Step 5: Solve for x
    x = 229,294.44/466.40
  6. Step 6: Final answer
    x = 491.63

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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.