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Finding the Fourth Proportional to 643,494.96, 887,933.88 and 428,773.68

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Solution

The fourth proportional to 643,494.96, 887,933.88 and 428,773.68 is: 591,648.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,494.96 : 887,933.88 = 428,773.68 : x
  2. Step 2: Convert to fraction form
    643,494.96/887,933.88 = 428,773.68/x
  3. Step 3: Cross multiply
    643,494.96x = 887,933.88 × 428,773.68
  4. Step 4: Simplify right side
    643,494.96x = 380,722,677,324.28
  5. Step 5: Solve for x
    x = 380,722,677,324.28/643,494.96
  6. Step 6: Final answer
    x = 591,648.27

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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.