Home / 409,240.20-613,860.30-128,843.40

Finding the Fourth Proportional to 409,240.20, 613,860.30 and 128,843.40

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Solution

The fourth proportional to 409,240.20, 613,860.30 and 128,843.40 is: 193,265.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,240.20 : 613,860.30 = 128,843.40 : x
  2. Step 2: Convert to fraction form
    409,240.20/613,860.30 = 128,843.40/x
  3. Step 3: Cross multiply
    409,240.20x = 613,860.30 × 128,843.40
  4. Step 4: Simplify right side
    409,240.20x = 79,091,848,177.02
  5. Step 5: Solve for x
    x = 79,091,848,177.02/409,240.20
  6. Step 6: Final answer
    x = 193,265.10

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1.5x scale

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.