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Finding the Fourth Proportional to 291,218.06, 436,826.60 and 91,555.88

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Solution

The fourth proportional to 291,218.06, 436,826.60 and 91,555.88 is: 137,333.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,218.06 : 436,826.60 = 91,555.88 : x
  2. Step 2: Convert to fraction form
    291,218.06/436,826.60 = 91,555.88/x
  3. Step 3: Cross multiply
    291,218.06x = 436,826.60 × 91,555.88
  4. Step 4: Simplify right side
    291,218.06x = 39,994,043,770.41
  5. Step 5: Solve for x
    x = 39,994,043,770.41/291,218.06
  6. Step 6: Final answer
    x = 137,333.67

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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.