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Finding the Fourth Proportional to 1,370.70, 1,891.03 and 845.82

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Solution

The fourth proportional to 1,370.70, 1,891.03 and 845.82 is: 1,166.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,370.70 : 1,891.03 = 845.82 : x
  2. Step 2: Convert to fraction form
    1,370.70/1,891.03 = 845.82/x
  3. Step 3: Cross multiply
    1,370.70x = 1,891.03 × 845.82
  4. Step 4: Simplify right side
    1,370.70x = 1,599,470.99
  5. Step 5: Solve for x
    x = 1,599,470.99/1,370.70
  6. Step 6: Final answer
    x = 1,166.90

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1.5x scale

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.