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Finding the Fourth Proportional to 643,523.80, 888,076.42 and 353,132.83

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Solution

The fourth proportional to 643,523.80, 888,076.42 and 353,132.83 is: 487,330.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,523.80 : 888,076.42 = 353,132.83 : x
  2. Step 2: Convert to fraction form
    643,523.80/888,076.42 = 353,132.83/x
  3. Step 3: Cross multiply
    643,523.80x = 888,076.42 × 353,132.83
  4. Step 4: Simplify right side
    643,523.80x = 313,608,933,244.82
  5. Step 5: Solve for x
    x = 313,608,933,244.82/643,523.80
  6. Step 6: Final answer
    x = 487,330.75

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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.