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Finding the Fourth Proportional to 1,555,805, 2,147,010.96 and 840,413

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Solution

The fourth proportional to 1,555,805, 2,147,010.96 and 840,413 is: 1,159,769.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555,805 : 2,147,010.96 = 840,413 : x
  2. Step 2: Convert to fraction form
    1,555,805/2,147,010.96 = 840,413/x
  3. Step 3: Cross multiply
    1,555,805x = 2,147,010.96 × 840,413
  4. Step 4: Simplify right side
    1,555,805x = 1,804,375,921,926.48
  5. Step 5: Solve for x
    x = 1,804,375,921,926.48/1,555,805
  6. Step 6: Final answer
    x = 1,159,769.97

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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.