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Finding the Fourth Proportional to 2,945.20, 4,415.04 and 996.40

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Solution

The fourth proportional to 2,945.20, 4,415.04 and 996.40 is: 1,493.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,945.20 : 4,415.04 = 996.40 : x
  2. Step 2: Convert to fraction form
    2,945.20/4,415.04 = 996.40/x
  3. Step 3: Cross multiply
    2,945.20x = 4,415.04 × 996.40
  4. Step 4: Simplify right side
    2,945.20x = 4,399,145.86
  5. Step 5: Solve for x
    x = 4,399,145.86/2,945.20
  6. Step 6: Final answer
    x = 1,493.67

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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.