Home / 427,213.85-640,884.49-157,321.22

Finding the Fourth Proportional to 427,213.85, 640,884.49 and 157,321.22

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Solution

The fourth proportional to 427,213.85, 640,884.49 and 157,321.22 is: 236,005.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,213.85 : 640,884.49 = 157,321.22 : x
  2. Step 2: Convert to fraction form
    427,213.85/640,884.49 = 157,321.22/x
  3. Step 3: Cross multiply
    427,213.85x = 640,884.49 × 157,321.22
  4. Step 4: Simplify right side
    427,213.85x = 100,824,730,661.48
  5. Step 5: Solve for x
    x = 100,824,730,661.48/427,213.85
  6. Step 6: Final answer
    x = 236,005.29

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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.