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Finding the Fourth Proportional to 555,388.09, 766,439.24 and 300,739.27

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Solution

The fourth proportional to 555,388.09, 766,439.24 and 300,739.27 is: 415,022.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,388.09 : 766,439.24 = 300,739.27 : x
  2. Step 2: Convert to fraction form
    555,388.09/766,439.24 = 300,739.27/x
  3. Step 3: Cross multiply
    555,388.09x = 766,439.24 × 300,739.27
  4. Step 4: Simplify right side
    555,388.09x = 230,498,377,536.96
  5. Step 5: Solve for x
    x = 230,498,377,536.96/555,388.09
  6. Step 6: Final answer
    x = 415,022.18

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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.