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Finding the Fourth Proportional to 685,221.67, 945,594.44 and 379,291.48

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Solution

The fourth proportional to 685,221.67, 945,594.44 and 379,291.48 is: 523,415.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,221.67 : 945,594.44 = 379,291.48 : x
  2. Step 2: Convert to fraction form
    685,221.67/945,594.44 = 379,291.48/x
  3. Step 3: Cross multiply
    685,221.67x = 945,594.44 × 379,291.48
  4. Step 4: Simplify right side
    685,221.67x = 358,655,914,627.37
  5. Step 5: Solve for x
    x = 358,655,914,627.37/685,221.67
  6. Step 6: Final answer
    x = 523,415.90

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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.