Home / 1,355,993.80-1,871,135.20-812,115.66

Finding the Fourth Proportional to 1,355,993.80, 1,871,135.20 and 812,115.66

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Solution

The fourth proportional to 1,355,993.80, 1,871,135.20 and 812,115.66 is: 1,120,638.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355,993.80 : 1,871,135.20 = 812,115.66 : x
  2. Step 2: Convert to fraction form
    1,355,993.80/1,871,135.20 = 812,115.66/x
  3. Step 3: Cross multiply
    1,355,993.80x = 1,871,135.20 × 812,115.66
  4. Step 4: Simplify right side
    1,355,993.80x = 1,519,578,197,897.23
  5. Step 5: Solve for x
    x = 1,519,578,197,897.23/1,355,993.80
  6. Step 6: Final answer
    x = 1,120,638.01

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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.