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Finding the Fourth Proportional to 1,780,789.78, 2,457,491.97 and 964,986.34

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Solution

The fourth proportional to 1,780,789.78, 2,457,491.97 and 964,986.34 is: 1,331,682.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780,789.78 : 2,457,491.97 = 964,986.34 : x
  2. Step 2: Convert to fraction form
    1,780,789.78/2,457,491.97 = 964,986.34/x
  3. Step 3: Cross multiply
    1,780,789.78x = 2,457,491.97 × 964,986.34
  4. Step 4: Simplify right side
    1,780,789.78x = 2,371,446,181,709.69
  5. Step 5: Solve for x
    x = 2,371,446,181,709.69/1,780,789.78
  6. Step 6: Final answer
    x = 1,331,682.27

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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.