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Finding the Fourth Proportional to 518.59, 774.54 and 343.63

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Solution

The fourth proportional to 518.59, 774.54 and 343.63 is: 513.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.59 : 774.54 = 343.63 : x
  2. Step 2: Convert to fraction form
    518.59/774.54 = 343.63/x
  3. Step 3: Cross multiply
    518.59x = 774.54 × 343.63
  4. Step 4: Simplify right side
    518.59x = 266,155.18
  5. Step 5: Solve for x
    x = 266,155.18/518.59
  6. Step 6: Final answer
    x = 513.23

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.