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Finding the Fourth Proportional to 1,321,839.92, 1,824,135.72 and 718,227.92

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Solution

The fourth proportional to 1,321,839.92, 1,824,135.72 and 718,227.92 is: 991,152.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,839.92 : 1,824,135.72 = 718,227.92 : x
  2. Step 2: Convert to fraction form
    1,321,839.92/1,824,135.72 = 718,227.92/x
  3. Step 3: Cross multiply
    1,321,839.92x = 1,824,135.72 × 718,227.92
  4. Step 4: Simplify right side
    1,321,839.92x = 1,310,145,203,973.30
  5. Step 5: Solve for x
    x = 1,310,145,203,973.30/1,321,839.92
  6. Step 6: Final answer
    x = 991,152.70

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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.