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Finding the Fourth Proportional to 1,363.11, 1,880.54 and 949.35

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Solution

The fourth proportional to 1,363.11, 1,880.54 and 949.35 is: 1,309.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,363.11 : 1,880.54 = 949.35 : x
  2. Step 2: Convert to fraction form
    1,363.11/1,880.54 = 949.35/x
  3. Step 3: Cross multiply
    1,363.11x = 1,880.54 × 949.35
  4. Step 4: Simplify right side
    1,363.11x = 1,785,285.90
  5. Step 5: Solve for x
    x = 1,785,285.90/1,363.11
  6. Step 6: Final answer
    x = 1,309.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.