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Finding the Fourth Proportional to 443.36, 664.99 and 118.76

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Solution

The fourth proportional to 443.36, 664.99 and 118.76 is: 178.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.36 : 664.99 = 118.76 : x
  2. Step 2: Convert to fraction form
    443.36/664.99 = 118.76/x
  3. Step 3: Cross multiply
    443.36x = 664.99 × 118.76
  4. Step 4: Simplify right side
    443.36x = 78,970.89
  5. Step 5: Solve for x
    x = 78,970.89/443.36
  6. Step 6: Final answer
    x = 178.12

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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.