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Finding the Fourth Proportional to 519,815.80, 717,357.72 and 305,110.72

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Solution

The fourth proportional to 519,815.80, 717,357.72 and 305,110.72 is: 421,059.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,815.80 : 717,357.72 = 305,110.72 : x
  2. Step 2: Convert to fraction form
    519,815.80/717,357.72 = 305,110.72/x
  3. Step 3: Cross multiply
    519,815.80x = 717,357.72 × 305,110.72
  4. Step 4: Simplify right side
    519,815.80x = 218,873,530,446.76
  5. Step 5: Solve for x
    x = 218,873,530,446.76/519,815.80
  6. Step 6: Final answer
    x = 421,059.79

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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.