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Finding the Fourth Proportional to 643,591.44, 888,142.56 and 357,105.36

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Solution

The fourth proportional to 643,591.44, 888,142.56 and 357,105.36 is: 492,797.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,591.44 : 888,142.56 = 357,105.36 : x
  2. Step 2: Convert to fraction form
    643,591.44/888,142.56 = 357,105.36/x
  3. Step 3: Cross multiply
    643,591.44x = 888,142.56 × 357,105.36
  4. Step 4: Simplify right side
    643,591.44x = 317,160,468,620.12
  5. Step 5: Solve for x
    x = 317,160,468,620.12/643,591.44
  6. Step 6: Final answer
    x = 492,797.84

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1.5x scale

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.