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Finding the Fourth Proportional to 555,620.78, 766,760.36 and 300,971.96

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Solution

The fourth proportional to 555,620.78, 766,760.36 and 300,971.96 is: 415,343.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,620.78 : 766,760.36 = 300,971.96 : x
  2. Step 2: Convert to fraction form
    555,620.78/766,760.36 = 300,971.96/x
  3. Step 3: Cross multiply
    555,620.78x = 766,760.36 × 300,971.96
  4. Step 4: Simplify right side
    555,620.78x = 230,773,368,399.51
  5. Step 5: Solve for x
    x = 230,773,368,399.51/555,620.78
  6. Step 6: Final answer
    x = 415,343.30

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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.