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Finding the Fourth Proportional to 1,372.57, 1,893.05 and 1,206.43

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Solution

The fourth proportional to 1,372.57, 1,893.05 and 1,206.43 is: 1,663.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.57 : 1,893.05 = 1,206.43 : x
  2. Step 2: Convert to fraction form
    1,372.57/1,893.05 = 1,206.43/x
  3. Step 3: Cross multiply
    1,372.57x = 1,893.05 × 1,206.43
  4. Step 4: Simplify right side
    1,372.57x = 2,283,826.07
  5. Step 5: Solve for x
    x = 2,283,826.07/1,372.57
  6. Step 6: Final answer
    x = 1,663.91

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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.