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Finding the Fourth Proportional to 518.92, 774.90 and 454.12

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Solution

The fourth proportional to 518.92, 774.90 and 454.12 is: 678.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.92 : 774.90 = 454.12 : x
  2. Step 2: Convert to fraction form
    518.92/774.90 = 454.12/x
  3. Step 3: Cross multiply
    518.92x = 774.90 × 454.12
  4. Step 4: Simplify right side
    518.92x = 351,897.59
  5. Step 5: Solve for x
    x = 351,897.59/518.92
  6. Step 6: Final answer
    x = 678.13

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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.