Home / 1,189,231.78-1,641,140.90-645,367.56

Finding the Fourth Proportional to 1,189,231.78, 1,641,140.90 and 645,367.56

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Solution

The fourth proportional to 1,189,231.78, 1,641,140.90 and 645,367.56 is: 890,607.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,231.78 : 1,641,140.90 = 645,367.56 : x
  2. Step 2: Convert to fraction form
    1,189,231.78/1,641,140.90 = 645,367.56/x
  3. Step 3: Cross multiply
    1,189,231.78x = 1,641,140.90 × 645,367.56
  4. Step 4: Simplify right side
    1,189,231.78x = 1,059,139,098,249.20
  5. Step 5: Solve for x
    x = 1,059,139,098,249.20/1,189,231.78
  6. Step 6: Final answer
    x = 890,607.80

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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.