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Finding the Fourth Proportional to 639,639.43, 960,602.72 and 613,924.31

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Solution

The fourth proportional to 639,639.43, 960,602.72 and 613,924.31 is: 921,984.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,639.43 : 960,602.72 = 613,924.31 : x
  2. Step 2: Convert to fraction form
    639,639.43/960,602.72 = 613,924.31/x
  3. Step 3: Cross multiply
    639,639.43x = 960,602.72 × 613,924.31
  4. Step 4: Simplify right side
    639,639.43x = 589,737,361,392.01
  5. Step 5: Solve for x
    x = 589,737,361,392.01/639,639.43
  6. Step 6: Final answer
    x = 921,984.07

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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.