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Finding the Fourth Proportional to 311,947.80, 467,921.70 and 154,143.60

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Solution

The fourth proportional to 311,947.80, 467,921.70 and 154,143.60 is: 231,215.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,947.80 : 467,921.70 = 154,143.60 : x
  2. Step 2: Convert to fraction form
    311,947.80/467,921.70 = 154,143.60/x
  3. Step 3: Cross multiply
    311,947.80x = 467,921.70 × 154,143.60
  4. Step 4: Simplify right side
    311,947.80x = 72,127,135,356.12
  5. Step 5: Solve for x
    x = 72,127,135,356.12/311,947.80
  6. Step 6: Final answer
    x = 231,215.40

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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.