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Finding the Fourth Proportional to 577,115.15, 796,394.23 and 318,978.88

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Solution

The fourth proportional to 577,115.15, 796,394.23 and 318,978.88 is: 440,177.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,115.15 : 796,394.23 = 318,978.88 : x
  2. Step 2: Convert to fraction form
    577,115.15/796,394.23 = 318,978.88/x
  3. Step 3: Cross multiply
    577,115.15x = 796,394.23 × 318,978.88
  4. Step 4: Simplify right side
    577,115.15x = 254,032,936,735.43
  5. Step 5: Solve for x
    x = 254,032,936,735.43/577,115.15
  6. Step 6: Final answer
    x = 440,177.21

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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.