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Finding the Fourth Proportional to 611,883.88, 844,520.64 and 390,979.96

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Solution

The fourth proportional to 611,883.88, 844,520.64 and 390,979.96 is: 539,629.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,883.88 : 844,520.64 = 390,979.96 : x
  2. Step 2: Convert to fraction form
    611,883.88/844,520.64 = 390,979.96/x
  3. Step 3: Cross multiply
    611,883.88x = 844,520.64 × 390,979.96
  4. Step 4: Simplify right side
    611,883.88x = 330,190,646,046.37
  5. Step 5: Solve for x
    x = 330,190,646,046.37/611,883.88
  6. Step 6: Final answer
    x = 539,629.59

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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.