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Finding the Fourth Proportional to 1,371.66, 1,894.49 and 1,039.51

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Solution

The fourth proportional to 1,371.66, 1,894.49 and 1,039.51 is: 1,435.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,371.66 : 1,894.49 = 1,039.51 : x
  2. Step 2: Convert to fraction form
    1,371.66/1,894.49 = 1,039.51/x
  3. Step 3: Cross multiply
    1,371.66x = 1,894.49 × 1,039.51
  4. Step 4: Simplify right side
    1,371.66x = 1,969,337.04
  5. Step 5: Solve for x
    x = 1,969,337.04/1,371.66
  6. Step 6: Final answer
    x = 1,435.73

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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.