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Finding the Fourth Proportional to 443.33, 665.06 and 118.72

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Solution

The fourth proportional to 443.33, 665.06 and 118.72 is: 178.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.33 : 665.06 = 118.72 : x
  2. Step 2: Convert to fraction form
    443.33/665.06 = 118.72/x
  3. Step 3: Cross multiply
    443.33x = 665.06 × 118.72
  4. Step 4: Simplify right side
    443.33x = 78,955.92
  5. Step 5: Solve for x
    x = 78,955.92/443.33
  6. Step 6: Final answer
    x = 178.10

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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.