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Finding the Fourth Proportional to 1,121.37, 1,545.36 and 806.07

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Solution

The fourth proportional to 1,121.37, 1,545.36 and 806.07 is: 1,110.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.37 : 1,545.36 = 806.07 : x
  2. Step 2: Convert to fraction form
    1,121.37/1,545.36 = 806.07/x
  3. Step 3: Cross multiply
    1,121.37x = 1,545.36 × 806.07
  4. Step 4: Simplify right side
    1,121.37x = 1,245,668.34
  5. Step 5: Solve for x
    x = 1,245,668.34/1,121.37
  6. Step 6: Final answer
    x = 1,110.85

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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.