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Finding the Fourth Proportional to 1,370.18, 1,891.20 and 845.91

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Solution

The fourth proportional to 1,370.18, 1,891.20 and 845.91 is: 1,167.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370.18 : 1,891.20 = 845.91 : x
  2. Step 2: Convert to fraction form
    1,370.18/1,891.20 = 845.91/x
  3. Step 3: Cross multiply
    1,370.18x = 1,891.20 × 845.91
  4. Step 4: Simplify right side
    1,370.18x = 1,599,781.07
  5. Step 5: Solve for x
    x = 1,599,781.07/1,370.18
  6. Step 6: Final answer
    x = 1,167.57

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