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Finding the Fourth Proportional to 1,958,993.72, 2,939,625.06 and 821,654.72

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Solution

The fourth proportional to 1,958,993.72, 2,939,625.06 and 821,654.72 is: 1,232,957.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,958,993.72 : 2,939,625.06 = 821,654.72 : x
  2. Step 2: Convert to fraction form
    1,958,993.72/2,939,625.06 = 821,654.72/x
  3. Step 3: Cross multiply
    1,958,993.72x = 2,939,625.06 × 821,654.72
  4. Step 4: Simplify right side
    1,958,993.72x = 2,415,356,805,579.28
  5. Step 5: Solve for x
    x = 2,415,356,805,579.28/1,958,993.72
  6. Step 6: Final answer
    x = 1,232,957.91

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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.