Home / 428,789.72-591,651.54-247,435.47

Finding the Fourth Proportional to 428,789.72, 591,651.54 and 247,435.47

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Solution

The fourth proportional to 428,789.72, 591,651.54 and 247,435.47 is: 341,415.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,789.72 : 591,651.54 = 247,435.47 : x
  2. Step 2: Convert to fraction form
    428,789.72/591,651.54 = 247,435.47/x
  3. Step 3: Cross multiply
    428,789.72x = 591,651.54 × 247,435.47
  4. Step 4: Simplify right side
    428,789.72x = 146,395,576,876.12
  5. Step 5: Solve for x
    x = 146,395,576,876.12/428,789.72
  6. Step 6: Final answer
    x = 341,415.78

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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.