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Finding the Fourth Proportional to 385.76, 578.77 and 166.28

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Solution

The fourth proportional to 385.76, 578.77 and 166.28 is: 249.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    385.76 : 578.77 = 166.28 : x
  2. Step 2: Convert to fraction form
    385.76/578.77 = 166.28/x
  3. Step 3: Cross multiply
    385.76x = 578.77 × 166.28
  4. Step 4: Simplify right side
    385.76x = 96,238.91
  5. Step 5: Solve for x
    x = 96,238.91/385.76
  6. Step 6: Final answer
    x = 249.48

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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.