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Finding the Fourth Proportional to 445.56, 667.99 and 272.08

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Solution

The fourth proportional to 445.56, 667.99 and 272.08 is: 407.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.56 : 667.99 = 272.08 : x
  2. Step 2: Convert to fraction form
    445.56/667.99 = 272.08/x
  3. Step 3: Cross multiply
    445.56x = 667.99 × 272.08
  4. Step 4: Simplify right side
    445.56x = 181,746.72
  5. Step 5: Solve for x
    x = 181,746.72/445.56
  6. Step 6: Final answer
    x = 407.91

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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.