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Finding the Fourth Proportional to 345,268.56, 517,507.56 and 145,289.28

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Solution

The fourth proportional to 345,268.56, 517,507.56 and 145,289.28 is: 217,767.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,268.56 : 517,507.56 = 145,289.28 : x
  2. Step 2: Convert to fraction form
    345,268.56/517,507.56 = 145,289.28/x
  3. Step 3: Cross multiply
    345,268.56x = 517,507.56 × 145,289.28
  4. Step 4: Simplify right side
    345,268.56x = 75,188,300,786.96
  5. Step 5: Solve for x
    x = 75,188,300,786.96/345,268.56
  6. Step 6: Final answer
    x = 217,767.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.