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Finding the Fourth Proportional to 428,795.88, 591,643.56 and 247,469.28

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Solution

The fourth proportional to 428,795.88, 591,643.56 and 247,469.28 is: 341,452.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,795.88 : 591,643.56 = 247,469.28 : x
  2. Step 2: Convert to fraction form
    428,795.88/591,643.56 = 247,469.28/x
  3. Step 3: Cross multiply
    428,795.88x = 591,643.56 × 247,469.28
  4. Step 4: Simplify right side
    428,795.88x = 146,413,605,809.84
  5. Step 5: Solve for x
    x = 146,413,605,809.84/428,795.88
  6. Step 6: Final answer
    x = 341,452.92

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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.