Home / 1,189,286.78-1,641,227.78-645,427.26

Finding the Fourth Proportional to 1,189,286.78, 1,641,227.78 and 645,427.26

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Solution

The fourth proportional to 1,189,286.78, 1,641,227.78 and 645,427.26 is: 890,696.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,286.78 : 1,641,227.78 = 645,427.26 : x
  2. Step 2: Convert to fraction form
    1,189,286.78/1,641,227.78 = 645,427.26/x
  3. Step 3: Cross multiply
    1,189,286.78x = 1,641,227.78 × 645,427.26
  4. Step 4: Simplify right side
    1,189,286.78x = 1,059,293,149,081.28
  5. Step 5: Solve for x
    x = 1,059,293,149,081.28/1,189,286.78
  6. Step 6: Final answer
    x = 890,696.14

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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.