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Finding the Fourth Proportional to 930.09, 1,395 and 518.97

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Solution

The fourth proportional to 930.09, 1,395 and 518.97 is: 778.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.09 : 1,395 = 518.97 : x
  2. Step 2: Convert to fraction form
    930.09/1,395 = 518.97/x
  3. Step 3: Cross multiply
    930.09x = 1,395 × 518.97
  4. Step 4: Simplify right side
    930.09x = 723,963.15
  5. Step 5: Solve for x
    x = 723,963.15/930.09
  6. Step 6: Final answer
    x = 778.38

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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.