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Finding the Fourth Proportional to 717,616.87, 990,243.12 and 411,718.45

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Solution

The fourth proportional to 717,616.87, 990,243.12 and 411,718.45 is: 568,132.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,616.87 : 990,243.12 = 411,718.45 : x
  2. Step 2: Convert to fraction form
    717,616.87/990,243.12 = 411,718.45/x
  3. Step 3: Cross multiply
    717,616.87x = 990,243.12 × 411,718.45
  4. Step 4: Simplify right side
    717,616.87x = 407,701,362,489.56
  5. Step 5: Solve for x
    x = 407,701,362,489.56/717,616.87
  6. Step 6: Final answer
    x = 568,132.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.