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Finding the Fourth Proportional to 555,640.56, 766,783.92 and 300,991.68

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Solution

The fourth proportional to 555,640.56, 766,783.92 and 300,991.68 is: 415,368.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,640.56 : 766,783.92 = 300,991.68 : x
  2. Step 2: Convert to fraction form
    555,640.56/766,783.92 = 300,991.68/x
  3. Step 3: Cross multiply
    555,640.56x = 766,783.92 × 300,991.68
  4. Step 4: Simplify right side
    555,640.56x = 230,795,580,277.79
  5. Step 5: Solve for x
    x = 230,795,580,277.79/555,640.56
  6. Step 6: Final answer
    x = 415,368.49

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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.