Home / 1,290,923.54-1,781,849.65-861,202.61

Finding the Fourth Proportional to 1,290,923.54, 1,781,849.65 and 861,202.61

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Solution

The fourth proportional to 1,290,923.54, 1,781,849.65 and 861,202.61 is: 1,188,709.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,923.54 : 1,781,849.65 = 861,202.61 : x
  2. Step 2: Convert to fraction form
    1,290,923.54/1,781,849.65 = 861,202.61/x
  3. Step 3: Cross multiply
    1,290,923.54x = 1,781,849.65 × 861,202.61
  4. Step 4: Simplify right side
    1,290,923.54x = 1,534,533,569,207.59
  5. Step 5: Solve for x
    x = 1,534,533,569,207.59/1,290,923.54
  6. Step 6: Final answer
    x = 1,188,709.88

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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.