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Finding the Fourth Proportional to 428,869, 591,839.70 and 250,055.56

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Solution

The fourth proportional to 428,869, 591,839.70 and 250,055.56 is: 345,076.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,869 : 591,839.70 = 250,055.56 : x
  2. Step 2: Convert to fraction form
    428,869/591,839.70 = 250,055.56/x
  3. Step 3: Cross multiply
    428,869x = 591,839.70 × 250,055.56
  4. Step 4: Simplify right side
    428,869x = 147,992,807,613.73
  5. Step 5: Solve for x
    x = 147,992,807,613.73/428,869
  6. Step 6: Final answer
    x = 345,076.95

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1.5x scale

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.