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Finding the Fourth Proportional to 515.08, 772.48 and 149.77

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Solution

The fourth proportional to 515.08, 772.48 and 149.77 is: 224.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.08 : 772.48 = 149.77 : x
  2. Step 2: Convert to fraction form
    515.08/772.48 = 149.77/x
  3. Step 3: Cross multiply
    515.08x = 772.48 × 149.77
  4. Step 4: Simplify right side
    515.08x = 115,694.33
  5. Step 5: Solve for x
    x = 115,694.33/515.08
  6. Step 6: Final answer
    x = 224.61

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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.