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Finding the Fourth Proportional to 393,725.80, 543,003.78 and 250,431.40

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Solution

The fourth proportional to 393,725.80, 543,003.78 and 250,431.40 is: 345,380.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,725.80 : 543,003.78 = 250,431.40 : x
  2. Step 2: Convert to fraction form
    393,725.80/543,003.78 = 250,431.40/x
  3. Step 3: Cross multiply
    393,725.80x = 543,003.78 × 250,431.40
  4. Step 4: Simplify right side
    393,725.80x = 135,985,196,830.69
  5. Step 5: Solve for x
    x = 135,985,196,830.69/393,725.80
  6. Step 6: Final answer
    x = 345,380.46

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1.5x scale

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.