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Finding the Fourth Proportional to 663, 993.28 and 479.94

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Solution

The fourth proportional to 663, 993.28 and 479.94 is: 719.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    663 : 993.28 = 479.94 : x
  2. Step 2: Convert to fraction form
    663/993.28 = 479.94/x
  3. Step 3: Cross multiply
    663x = 993.28 × 479.94
  4. Step 4: Simplify right side
    663x = 476,714.80
  5. Step 5: Solve for x
    x = 476,714.80/663
  6. Step 6: Final answer
    x = 719.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.