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Finding the Fourth Proportional to 1,200,692.40, 1,796,664.60 and 885,764.40

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Solution

The fourth proportional to 1,200,692.40, 1,796,664.60 and 885,764.40 is: 1,325,419.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200,692.40 : 1,796,664.60 = 885,764.40 : x
  2. Step 2: Convert to fraction form
    1,200,692.40/1,796,664.60 = 885,764.40/x
  3. Step 3: Cross multiply
    1,200,692.40x = 1,796,664.60 × 885,764.40
  4. Step 4: Simplify right side
    1,200,692.40x = 1,591,421,541,420.24
  5. Step 5: Solve for x
    x = 1,591,421,541,420.24/1,200,692.40
  6. Step 6: Final answer
    x = 1,325,419.85

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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.