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Finding the Fourth Proportional to 717,806.67, 990,617.45 and 395,516.72

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Solution

The fourth proportional to 717,806.67, 990,617.45 and 395,516.72 is: 545,837.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,806.67 : 990,617.45 = 395,516.72 : x
  2. Step 2: Convert to fraction form
    717,806.67/990,617.45 = 395,516.72/x
  3. Step 3: Cross multiply
    717,806.67x = 990,617.45 × 395,516.72
  4. Step 4: Simplify right side
    717,806.67x = 391,805,757,668.09
  5. Step 5: Solve for x
    x = 391,805,757,668.09/717,806.67
  6. Step 6: Final answer
    x = 545,837.44

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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.