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Finding the Fourth Proportional to 555,641.56, 766,785.30 and 300,992.68

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Solution

The fourth proportional to 555,641.56, 766,785.30 and 300,992.68 is: 415,369.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,641.56 : 766,785.30 = 300,992.68 : x
  2. Step 2: Convert to fraction form
    555,641.56/766,785.30 = 300,992.68/x
  3. Step 3: Cross multiply
    555,641.56x = 766,785.30 × 300,992.68
  4. Step 4: Simplify right side
    555,641.56x = 230,796,762,431.60
  5. Step 5: Solve for x
    x = 230,796,762,431.60/555,641.56
  6. Step 6: Final answer
    x = 415,369.87

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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.