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Finding the Fourth Proportional to 519,561.23, 779,566.35 and 279,394.42

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Solution

The fourth proportional to 519,561.23, 779,566.35 and 279,394.42 is: 419,212.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,561.23 : 779,566.35 = 279,394.42 : x
  2. Step 2: Convert to fraction form
    519,561.23/779,566.35 = 279,394.42/x
  3. Step 3: Cross multiply
    519,561.23x = 779,566.35 × 279,394.42
  4. Step 4: Simplify right side
    519,561.23x = 217,806,487,308.58
  5. Step 5: Solve for x
    x = 217,806,487,308.58/519,561.23
  6. Step 6: Final answer
    x = 419,212.36

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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.