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Finding the Fourth Proportional to 1,571,805, 2,169,090.90 and 856,413

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Solution

The fourth proportional to 1,571,805, 2,169,090.90 and 856,413 is: 1,181,849.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571,805 : 2,169,090.90 = 856,413 : x
  2. Step 2: Convert to fraction form
    1,571,805/2,169,090.90 = 856,413/x
  3. Step 3: Cross multiply
    1,571,805x = 2,169,090.90 × 856,413
  4. Step 4: Simplify right side
    1,571,805x = 1,857,637,644,941.70
  5. Step 5: Solve for x
    x = 1,857,637,644,941.70/1,571,805
  6. Step 6: Final answer
    x = 1,181,849.94

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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.