Home / 408,864.20-613,301.75-128,381.45

Finding the Fourth Proportional to 408,864.20, 613,301.75 and 128,381.45

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Solution

The fourth proportional to 408,864.20, 613,301.75 and 128,381.45 is: 192,573.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,864.20 : 613,301.75 = 128,381.45 : x
  2. Step 2: Convert to fraction form
    408,864.20/613,301.75 = 128,381.45/x
  3. Step 3: Cross multiply
    408,864.20x = 613,301.75 × 128,381.45
  4. Step 4: Simplify right side
    408,864.20x = 78,736,564,244.12
  5. Step 5: Solve for x
    x = 78,736,564,244.12/408,864.20
  6. Step 6: Final answer
    x = 192,573.88

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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.