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Finding the Fourth Proportional to 1,370.10, 1,892.12 and 872.97

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Solution

The fourth proportional to 1,370.10, 1,892.12 and 872.97 is: 1,205.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370.10 : 1,892.12 = 872.97 : x
  2. Step 2: Convert to fraction form
    1,370.10/1,892.12 = 872.97/x
  3. Step 3: Cross multiply
    1,370.10x = 1,892.12 × 872.97
  4. Step 4: Simplify right side
    1,370.10x = 1,651,764.00
  5. Step 5: Solve for x
    x = 1,651,764.00/1,370.10
  6. Step 6: Final answer
    x = 1,205.58

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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.