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Finding the Fourth Proportional to 1,182,387, 1,631,694.24 and 645,843

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Solution

The fourth proportional to 1,182,387, 1,631,694.24 and 645,843 is: 891,263.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182,387 : 1,631,694.24 = 645,843 : x
  2. Step 2: Convert to fraction form
    1,182,387/1,631,694.24 = 645,843/x
  3. Step 3: Cross multiply
    1,182,387x = 1,631,694.24 × 645,843
  4. Step 4: Simplify right side
    1,182,387x = 1,053,818,303,044.32
  5. Step 5: Solve for x
    x = 1,053,818,303,044.32/1,182,387
  6. Step 6: Final answer
    x = 891,263.44

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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.