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Finding the Fourth Proportional to 514.74, 772.16 and 149.56

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Solution

The fourth proportional to 514.74, 772.16 and 149.56 is: 224.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.74 : 772.16 = 149.56 : x
  2. Step 2: Convert to fraction form
    514.74/772.16 = 149.56/x
  3. Step 3: Cross multiply
    514.74x = 772.16 × 149.56
  4. Step 4: Simplify right side
    514.74x = 115,484.25
  5. Step 5: Solve for x
    x = 115,484.25/514.74
  6. Step 6: Final answer
    x = 224.35

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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.