Home / 938,561.43-1,407,840.42-811,824.78

Finding the Fourth Proportional to 938,561.43, 1,407,840.42 and 811,824.78

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Solution

The fourth proportional to 938,561.43, 1,407,840.42 and 811,824.78 is: 1,217,735.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    938,561.43 : 1,407,840.42 = 811,824.78 : x
  2. Step 2: Convert to fraction form
    938,561.43/1,407,840.42 = 811,824.78/x
  3. Step 3: Cross multiply
    938,561.43x = 1,407,840.42 × 811,824.78
  4. Step 4: Simplify right side
    938,561.43x = 1,142,919,739,241.61
  5. Step 5: Solve for x
    x = 1,142,919,739,241.61/938,561.43
  6. Step 6: Final answer
    x = 1,217,735.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.