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Finding the Fourth Proportional to 577,406.78, 796,789.40 and 319,268.69

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Solution

The fourth proportional to 577,406.78, 796,789.40 and 319,268.69 is: 440,573.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,406.78 : 796,789.40 = 319,268.69 : x
  2. Step 2: Convert to fraction form
    577,406.78/796,789.40 = 319,268.69/x
  3. Step 3: Cross multiply
    577,406.78x = 796,789.40 × 319,268.69
  4. Step 4: Simplify right side
    577,406.78x = 254,389,902,363.60
  5. Step 5: Solve for x
    x = 254,389,902,363.60/577,406.78
  6. Step 6: Final answer
    x = 440,573.12

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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.