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Finding the Fourth Proportional to 445.25, 665.17 and 372.35

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Solution

The fourth proportional to 445.25, 665.17 and 372.35 is: 556.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.25 : 665.17 = 372.35 : x
  2. Step 2: Convert to fraction form
    445.25/665.17 = 372.35/x
  3. Step 3: Cross multiply
    445.25x = 665.17 × 372.35
  4. Step 4: Simplify right side
    445.25x = 247,676.05
  5. Step 5: Solve for x
    x = 247,676.05/445.25
  6. Step 6: Final answer
    x = 556.26

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.