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Finding the Fourth Proportional to 327,978.60, 492,091.80 and 128,441.56

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Solution

The fourth proportional to 327,978.60, 492,091.80 and 128,441.56 is: 192,710.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,978.60 : 492,091.80 = 128,441.56 : x
  2. Step 2: Convert to fraction form
    327,978.60/492,091.80 = 128,441.56/x
  3. Step 3: Cross multiply
    327,978.60x = 492,091.80 × 128,441.56
  4. Step 4: Simplify right side
    327,978.60x = 63,205,038,455.21
  5. Step 5: Solve for x
    x = 63,205,038,455.21/327,978.60
  6. Step 6: Final answer
    x = 192,710.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.