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Finding the Fourth Proportional to 551,771.64, 827,651.34 and 388,995.60

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Solution

The fourth proportional to 551,771.64, 827,651.34 and 388,995.60 is: 583,489.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,771.64 : 827,651.34 = 388,995.60 : x
  2. Step 2: Convert to fraction form
    551,771.64/827,651.34 = 388,995.60/x
  3. Step 3: Cross multiply
    551,771.64x = 827,651.34 × 388,995.60
  4. Step 4: Simplify right side
    551,771.64x = 321,952,729,594.10
  5. Step 5: Solve for x
    x = 321,952,729,594.10/551,771.64
  6. Step 6: Final answer
    x = 583,489.09

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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.