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Finding the Fourth Proportional to 297,138.54, 445,708.62 and 72,499.62

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Solution

The fourth proportional to 297,138.54, 445,708.62 and 72,499.62 is: 108,749.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,138.54 : 445,708.62 = 72,499.62 : x
  2. Step 2: Convert to fraction form
    297,138.54/445,708.62 = 72,499.62/x
  3. Step 3: Cross multiply
    297,138.54x = 445,708.62 × 72,499.62
  4. Step 4: Simplify right side
    297,138.54x = 32,313,705,580.72
  5. Step 5: Solve for x
    x = 32,313,705,580.72/297,138.54
  6. Step 6: Final answer
    x = 108,749.63

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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.