Home / 861,344.78-1,292,288.71-405,917.64

Finding the Fourth Proportional to 861,344.78, 1,292,288.71 and 405,917.64

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Solution

The fourth proportional to 861,344.78, 1,292,288.71 and 405,917.64 is: 609,004.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,344.78 : 1,292,288.71 = 405,917.64 : x
  2. Step 2: Convert to fraction form
    861,344.78/1,292,288.71 = 405,917.64/x
  3. Step 3: Cross multiply
    861,344.78x = 1,292,288.71 × 405,917.64
  4. Step 4: Simplify right side
    861,344.78x = 524,562,783,361.84
  5. Step 5: Solve for x
    x = 524,562,783,361.84/861,344.78
  6. Step 6: Final answer
    x = 609,004.43

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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.