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Finding the Fourth Proportional to 300,879.28, 451,319.40 and 76,239.76

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Solution

The fourth proportional to 300,879.28, 451,319.40 and 76,239.76 is: 114,359.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,879.28 : 451,319.40 = 76,239.76 : x
  2. Step 2: Convert to fraction form
    300,879.28/451,319.40 = 76,239.76/x
  3. Step 3: Cross multiply
    300,879.28x = 451,319.40 × 76,239.76
  4. Step 4: Simplify right side
    300,879.28x = 34,408,482,739.34
  5. Step 5: Solve for x
    x = 34,408,482,739.34/300,879.28
  6. Step 6: Final answer
    x = 114,359.76

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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.