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Finding the Fourth Proportional to 311,982.20, 468,048.90 and 90,366.20

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Solution

The fourth proportional to 311,982.20, 468,048.90 and 90,366.20 is: 135,571.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,982.20 : 468,048.90 = 90,366.20 : x
  2. Step 2: Convert to fraction form
    311,982.20/468,048.90 = 90,366.20/x
  3. Step 3: Cross multiply
    311,982.20x = 468,048.90 × 90,366.20
  4. Step 4: Simplify right side
    311,982.20x = 42,295,800,507.18
  5. Step 5: Solve for x
    x = 42,295,800,507.18/311,982.20
  6. Step 6: Final answer
    x = 135,571.20

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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.