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Finding the Fourth Proportional to 640,380.20, 960,617.82 and 191,065.64

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Solution

The fourth proportional to 640,380.20, 960,617.82 and 191,065.64 is: 286,612.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,380.20 : 960,617.82 = 191,065.64 : x
  2. Step 2: Convert to fraction form
    640,380.20/960,617.82 = 191,065.64/x
  3. Step 3: Cross multiply
    640,380.20x = 960,617.82 × 191,065.64
  4. Step 4: Simplify right side
    640,380.20x = 183,541,058,573.71
  5. Step 5: Solve for x
    x = 183,541,058,573.71/640,380.20
  6. Step 6: Final answer
    x = 286,612.64

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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.