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Finding the Fourth Proportional to 1,325,143.80, 1,987,715.70 and 1,235,914.20

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Solution

The fourth proportional to 1,325,143.80, 1,987,715.70 and 1,235,914.20 is: 1,853,871.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325,143.80 : 1,987,715.70 = 1,235,914.20 : x
  2. Step 2: Convert to fraction form
    1,325,143.80/1,987,715.70 = 1,235,914.20/x
  3. Step 3: Cross multiply
    1,325,143.80x = 1,987,715.70 × 1,235,914.20
  4. Step 4: Simplify right side
    1,325,143.80x = 2,456,646,059,192.94
  5. Step 5: Solve for x
    x = 2,456,646,059,192.94/1,325,143.80
  6. Step 6: Final answer
    x = 1,853,871.30

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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.