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Finding the Fourth Proportional to 1,297,664.80, 1,945,172.40 and 876,983.20

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Solution

The fourth proportional to 1,297,664.80, 1,945,172.40 and 876,983.20 is: 1,314,579.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297,664.80 : 1,945,172.40 = 876,983.20 : x
  2. Step 2: Convert to fraction form
    1,297,664.80/1,945,172.40 = 876,983.20/x
  3. Step 3: Cross multiply
    1,297,664.80x = 1,945,172.40 × 876,983.20
  4. Step 4: Simplify right side
    1,297,664.80x = 1,705,883,515,903.68
  5. Step 5: Solve for x
    x = 1,705,883,515,903.68/1,297,664.80
  6. Step 6: Final answer
    x = 1,314,579.48

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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.