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Finding the Fourth Proportional to 2,666,978.73, 3,680,034.90 and 1,619,855.43

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Solution

The fourth proportional to 2,666,978.73, 3,680,034.90 and 1,619,855.43 is: 2,235,160.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,666,978.73 : 3,680,034.90 = 1,619,855.43 : x
  2. Step 2: Convert to fraction form
    2,666,978.73/3,680,034.90 = 1,619,855.43/x
  3. Step 3: Cross multiply
    2,666,978.73x = 3,680,034.90 × 1,619,855.43
  4. Step 4: Simplify right side
    2,666,978.73x = 5,961,124,515,354.51
  5. Step 5: Solve for x
    x = 5,961,124,515,354.51/2,666,978.73
  6. Step 6: Final answer
    x = 2,235,160.13

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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.