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Finding the Fourth Proportional to 2,781.34, 4,169.10 and 930.94

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Solution

The fourth proportional to 2,781.34, 4,169.10 and 930.94 is: 1,395.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.34 : 4,169.10 = 930.94 : x
  2. Step 2: Convert to fraction form
    2,781.34/4,169.10 = 930.94/x
  3. Step 3: Cross multiply
    2,781.34x = 4,169.10 × 930.94
  4. Step 4: Simplify right side
    2,781.34x = 3,881,161.11
  5. Step 5: Solve for x
    x = 3,881,161.11/2,781.34
  6. Step 6: Final answer
    x = 1,395.43

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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.