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Finding the Fourth Proportional to 1,321,917.76, 1,824,257.44 and 718,305.76

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Solution

The fourth proportional to 1,321,917.76, 1,824,257.44 and 718,305.76 is: 991,267.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,917.76 : 1,824,257.44 = 718,305.76 : x
  2. Step 2: Convert to fraction form
    1,321,917.76/1,824,257.44 = 718,305.76/x
  3. Step 3: Cross multiply
    1,321,917.76x = 1,824,257.44 × 718,305.76
  4. Step 4: Simplify right side
    1,321,917.76x = 1,310,374,626,874.85
  5. Step 5: Solve for x
    x = 1,310,374,626,874.85/1,321,917.76
  6. Step 6: Final answer
    x = 991,267.89

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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.