Home / 1,355,983.88-1,871,121.47-812,105.73

Finding the Fourth Proportional to 1,355,983.88, 1,871,121.47 and 812,105.73

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Solution

The fourth proportional to 1,355,983.88, 1,871,121.47 and 812,105.73 is: 1,120,624.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355,983.88 : 1,871,121.47 = 812,105.73 : x
  2. Step 2: Convert to fraction form
    1,355,983.88/1,871,121.47 = 812,105.73/x
  3. Step 3: Cross multiply
    1,355,983.88x = 1,871,121.47 × 812,105.73
  4. Step 4: Simplify right side
    1,355,983.88x = 1,519,548,463,252.49
  5. Step 5: Solve for x
    x = 1,519,548,463,252.49/1,355,983.88
  6. Step 6: Final answer
    x = 1,120,624.29

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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.