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Finding the Fourth Proportional to 422,555.12, 583,141.01 and 231,568.54

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Solution

The fourth proportional to 422,555.12, 583,141.01 and 231,568.54 is: 319,572.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,555.12 : 583,141.01 = 231,568.54 : x
  2. Step 2: Convert to fraction form
    422,555.12/583,141.01 = 231,568.54/x
  3. Step 3: Cross multiply
    422,555.12x = 583,141.01 × 231,568.54
  4. Step 4: Simplify right side
    422,555.12x = 135,037,112,299.83
  5. Step 5: Solve for x
    x = 135,037,112,299.83/422,555.12
  6. Step 6: Final answer
    x = 319,572.78

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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.