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Finding the Fourth Proportional to 386.10, 578.72 and 151.77

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Solution

The fourth proportional to 386.10, 578.72 and 151.77 is: 227.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.10 : 578.72 = 151.77 : x
  2. Step 2: Convert to fraction form
    386.10/578.72 = 151.77/x
  3. Step 3: Cross multiply
    386.10x = 578.72 × 151.77
  4. Step 4: Simplify right side
    386.10x = 87,832.33
  5. Step 5: Solve for x
    x = 87,832.33/386.10
  6. Step 6: Final answer
    x = 227.49

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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.