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Finding the Fourth Proportional to 445.73, 665.39 and 383.36

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Solution

The fourth proportional to 445.73, 665.39 and 383.36 is: 572.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.73 : 665.39 = 383.36 : x
  2. Step 2: Convert to fraction form
    445.73/665.39 = 383.36/x
  3. Step 3: Cross multiply
    445.73x = 665.39 × 383.36
  4. Step 4: Simplify right side
    445.73x = 255,081.54
  5. Step 5: Solve for x
    x = 255,081.54/445.73
  6. Step 6: Final answer
    x = 572.28

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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.