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Finding the Fourth Proportional to 1,670,811.56, 2,305,724.39 and 906,865.12

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Solution

The fourth proportional to 1,670,811.56, 2,305,724.39 and 906,865.12 is: 1,251,476.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,670,811.56 : 2,305,724.39 = 906,865.12 : x
  2. Step 2: Convert to fraction form
    1,670,811.56/2,305,724.39 = 906,865.12/x
  3. Step 3: Cross multiply
    1,670,811.56x = 2,305,724.39 × 906,865.12
  4. Step 4: Simplify right side
    1,670,811.56x = 2,090,981,025,624.28
  5. Step 5: Solve for x
    x = 2,090,981,025,624.28/1,670,811.56
  6. Step 6: Final answer
    x = 1,251,476.27

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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.