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Finding the Fourth Proportional to 515.01, 772.49 and 149.81

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Solution

The fourth proportional to 515.01, 772.49 and 149.81 is: 224.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.01 : 772.49 = 149.81 : x
  2. Step 2: Convert to fraction form
    515.01/772.49 = 149.81/x
  3. Step 3: Cross multiply
    515.01x = 772.49 × 149.81
  4. Step 4: Simplify right side
    515.01x = 115,729.03
  5. Step 5: Solve for x
    x = 115,729.03/515.01
  6. Step 6: Final answer
    x = 224.71

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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.