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Finding the Fourth Proportional to 385.36, 578.20 and 166.04

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Solution

The fourth proportional to 385.36, 578.20 and 166.04 is: 249.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.36 : 578.20 = 166.04 : x
  2. Step 2: Convert to fraction form
    385.36/578.20 = 166.04/x
  3. Step 3: Cross multiply
    385.36x = 578.20 × 166.04
  4. Step 4: Simplify right side
    385.36x = 96,004.33
  5. Step 5: Solve for x
    x = 96,004.33/385.36
  6. Step 6: Final answer
    x = 249.13

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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.