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Finding the Fourth Proportional to 1,396,959.82, 1,927,812.25 and 816,217.05

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Solution

The fourth proportional to 1,396,959.82, 1,927,812.25 and 816,217.05 is: 1,126,384.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396,959.82 : 1,927,812.25 = 816,217.05 : x
  2. Step 2: Convert to fraction form
    1,396,959.82/1,927,812.25 = 816,217.05/x
  3. Step 3: Cross multiply
    1,396,959.82x = 1,927,812.25 × 816,217.05
  4. Step 4: Simplify right side
    1,396,959.82x = 1,573,513,235,898.43
  5. Step 5: Solve for x
    x = 1,573,513,235,898.43/1,396,959.82
  6. Step 6: Final answer
    x = 1,126,384.03

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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.