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Finding the Fourth Proportional to 619,640.19, 928,275.42 and 418,975.65

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Solution

The fourth proportional to 619,640.19, 928,275.42 and 418,975.65 is: 627,662.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,640.19 : 928,275.42 = 418,975.65 : x
  2. Step 2: Convert to fraction form
    619,640.19/928,275.42 = 418,975.65/x
  3. Step 3: Cross multiply
    619,640.19x = 928,275.42 × 418,975.65
  4. Step 4: Simplify right side
    619,640.19x = 388,924,797,473.52
  5. Step 5: Solve for x
    x = 388,924,797,473.52/619,640.19
  6. Step 6: Final answer
    x = 627,662.32

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Double scale
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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.