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Finding the Fourth Proportional to 312,253.23, 430,917.86 and 189,703.89

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Solution

The fourth proportional to 312,253.23, 430,917.86 and 189,703.89 is: 261,796.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,253.23 : 430,917.86 = 189,703.89 : x
  2. Step 2: Convert to fraction form
    312,253.23/430,917.86 = 189,703.89/x
  3. Step 3: Cross multiply
    312,253.23x = 430,917.86 × 189,703.89
  4. Step 4: Simplify right side
    312,253.23x = 81,746,791,748.01
  5. Step 5: Solve for x
    x = 81,746,791,748.01/312,253.23
  6. Step 6: Final answer
    x = 261,796.46

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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.