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Finding the Fourth Proportional to 1,366.65, 1,889.78 and 1,086.39

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Solution

The fourth proportional to 1,366.65, 1,889.78 and 1,086.39 is: 1,502.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.65 : 1,889.78 = 1,086.39 : x
  2. Step 2: Convert to fraction form
    1,366.65/1,889.78 = 1,086.39/x
  3. Step 3: Cross multiply
    1,366.65x = 1,889.78 × 1,086.39
  4. Step 4: Simplify right side
    1,366.65x = 2,053,032.66
  5. Step 5: Solve for x
    x = 2,053,032.66/1,366.65
  6. Step 6: Final answer
    x = 1,502.24

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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.