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Finding the Fourth Proportional to 518.09, 777.20 and 491.94

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Solution

The fourth proportional to 518.09, 777.20 and 491.94 is: 737.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.09 : 777.20 = 491.94 : x
  2. Step 2: Convert to fraction form
    518.09/777.20 = 491.94/x
  3. Step 3: Cross multiply
    518.09x = 777.20 × 491.94
  4. Step 4: Simplify right side
    518.09x = 382,333.31
  5. Step 5: Solve for x
    x = 382,333.31/518.09
  6. Step 6: Final answer
    x = 737.97

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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.