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Finding the Fourth Proportional to 278,080.44, 417,244.73 and 128,240.30

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Solution

The fourth proportional to 278,080.44, 417,244.73 and 128,240.30 is: 192,417.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,080.44 : 417,244.73 = 128,240.30 : x
  2. Step 2: Convert to fraction form
    278,080.44/417,244.73 = 128,240.30/x
  3. Step 3: Cross multiply
    278,080.44x = 417,244.73 × 128,240.30
  4. Step 4: Simplify right side
    278,080.44x = 53,507,589,348.62
  5. Step 5: Solve for x
    x = 53,507,589,348.62/278,080.44
  6. Step 6: Final answer
    x = 192,417.67

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