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Finding the Fourth Proportional to 1,098,651, 1,516,010.76 and 639,865.92

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Solution

The fourth proportional to 1,098,651, 1,516,010.76 and 639,865.92 is: 882,940.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,098,651 : 1,516,010.76 = 639,865.92 : x
  2. Step 2: Convert to fraction form
    1,098,651/1,516,010.76 = 639,865.92/x
  3. Step 3: Cross multiply
    1,098,651x = 1,516,010.76 × 639,865.92
  4. Step 4: Simplify right side
    1,098,651x = 970,043,619,677.30
  5. Step 5: Solve for x
    x = 970,043,619,677.30/1,098,651
  6. Step 6: Final answer
    x = 882,940.64

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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.