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Finding the Fourth Proportional to 1,079,857.60, 1,619,786.40 and 725,963.20

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Solution

The fourth proportional to 1,079,857.60, 1,619,786.40 and 725,963.20 is: 1,088,944.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079,857.60 : 1,619,786.40 = 725,963.20 : x
  2. Step 2: Convert to fraction form
    1,079,857.60/1,619,786.40 = 725,963.20/x
  3. Step 3: Cross multiply
    1,079,857.60x = 1,619,786.40 × 725,963.20
  4. Step 4: Simplify right side
    1,079,857.60x = 1,175,905,318,260.48
  5. Step 5: Solve for x
    x = 1,175,905,318,260.48/1,079,857.60
  6. Step 6: Final answer
    x = 1,088,944.80

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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.