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Finding the Fourth Proportional to 921,668.92, 1,271,854.38 and 519,235

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Solution

The fourth proportional to 921,668.92, 1,271,854.38 and 519,235 is: 716,516.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,668.92 : 1,271,854.38 = 519,235 : x
  2. Step 2: Convert to fraction form
    921,668.92/1,271,854.38 = 519,235/x
  3. Step 3: Cross multiply
    921,668.92x = 1,271,854.38 × 519,235
  4. Step 4: Simplify right side
    921,668.92x = 660,391,308,999.30
  5. Step 5: Solve for x
    x = 660,391,308,999.30/921,668.92
  6. Step 6: Final answer
    x = 716,516.85

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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.