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Finding the Fourth Proportional to 1,586,387, 2,189,214.06 and 870,995

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Solution

The fourth proportional to 1,586,387, 2,189,214.06 and 870,995 is: 1,201,973.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,586,387 : 2,189,214.06 = 870,995 : x
  2. Step 2: Convert to fraction form
    1,586,387/2,189,214.06 = 870,995/x
  3. Step 3: Cross multiply
    1,586,387x = 2,189,214.06 × 870,995
  4. Step 4: Simplify right side
    1,586,387x = 1,906,794,500,189.70
  5. Step 5: Solve for x
    x = 1,906,794,500,189.70/1,586,387
  6. Step 6: Final answer
    x = 1,201,973.10

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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.