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Finding the Fourth Proportional to 207,667.20, 311,577.60 and 199,987.20

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Solution

The fourth proportional to 207,667.20, 311,577.60 and 199,987.20 is: 300,054.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,667.20 : 311,577.60 = 199,987.20 : x
  2. Step 2: Convert to fraction form
    207,667.20/311,577.60 = 199,987.20/x
  3. Step 3: Cross multiply
    207,667.20x = 311,577.60 × 199,987.20
  4. Step 4: Simplify right side
    207,667.20x = 62,311,531,806.72
  5. Step 5: Solve for x
    x = 62,311,531,806.72/207,667.20
  6. Step 6: Final answer
    x = 300,054.76

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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.