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Finding the Fourth Proportional to 428,382.22, 591,436.26 and 275,685.78

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Solution

The fourth proportional to 428,382.22, 591,436.26 and 275,685.78 is: 380,619.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,382.22 : 591,436.26 = 275,685.78 : x
  2. Step 2: Convert to fraction form
    428,382.22/591,436.26 = 275,685.78/x
  3. Step 3: Cross multiply
    428,382.22x = 591,436.26 × 275,685.78
  4. Step 4: Simplify right side
    428,382.22x = 163,050,567,600.54
  5. Step 5: Solve for x
    x = 163,050,567,600.54/428,382.22
  6. Step 6: Final answer
    x = 380,619.36

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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.