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Finding the Fourth Proportional to 1,670,786.74, 2,305,623.93 and 906,823.90

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Solution

The fourth proportional to 1,670,786.74, 2,305,623.93 and 906,823.90 is: 1,251,383.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,670,786.74 : 2,305,623.93 = 906,823.90 : x
  2. Step 2: Convert to fraction form
    1,670,786.74/2,305,623.93 = 906,823.90/x
  3. Step 3: Cross multiply
    1,670,786.74x = 2,305,623.93 × 906,823.90
  4. Step 4: Simplify right side
    1,670,786.74x = 2,090,794,884,135.93
  5. Step 5: Solve for x
    x = 2,090,794,884,135.93/1,670,786.74
  6. Step 6: Final answer
    x = 1,251,383.46

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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.