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Finding the Fourth Proportional to 1,275,992.82, 1,914,251.68 and 876,821.58

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Solution

The fourth proportional to 1,275,992.82, 1,914,251.68 and 876,821.58 is: 1,315,412.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275,992.82 : 1,914,251.68 = 876,821.58 : x
  2. Step 2: Convert to fraction form
    1,275,992.82/1,914,251.68 = 876,821.58/x
  3. Step 3: Cross multiply
    1,275,992.82x = 1,914,251.68 × 876,821.58
  4. Step 4: Simplify right side
    1,275,992.82x = 1,678,457,182,575.25
  5. Step 5: Solve for x
    x = 1,678,457,182,575.25/1,275,992.82
  6. Step 6: Final answer
    x = 1,315,412.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.