Home / 1,290,923.70-1,936,385.55-1,085,637.30

Finding the Fourth Proportional to 1,290,923.70, 1,936,385.55 and 1,085,637.30

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Solution

The fourth proportional to 1,290,923.70, 1,936,385.55 and 1,085,637.30 is: 1,628,455.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,923.70 : 1,936,385.55 = 1,085,637.30 : x
  2. Step 2: Convert to fraction form
    1,290,923.70/1,936,385.55 = 1,085,637.30/x
  3. Step 3: Cross multiply
    1,290,923.70x = 1,936,385.55 × 1,085,637.30
  4. Step 4: Simplify right side
    1,290,923.70x = 2,102,212,380,261.02
  5. Step 5: Solve for x
    x = 2,102,212,380,261.02/1,290,923.70
  6. Step 6: Final answer
    x = 1,628,455.95

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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.