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Finding the Fourth Proportional to 291,290.12, 436,958.76 and 80,928.08

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Solution

The fourth proportional to 291,290.12, 436,958.76 and 80,928.08 is: 121,398.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,290.12 : 436,958.76 = 80,928.08 : x
  2. Step 2: Convert to fraction form
    291,290.12/436,958.76 = 80,928.08/x
  3. Step 3: Cross multiply
    291,290.12x = 436,958.76 × 80,928.08
  4. Step 4: Simplify right side
    291,290.12x = 35,362,233,485.98
  5. Step 5: Solve for x
    x = 35,362,233,485.98/291,290.12
  6. Step 6: Final answer
    x = 121,398.67

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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.