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Finding the Fourth Proportional to 291,245.76, 436,871.52 and 80,884.80

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Solution

The fourth proportional to 291,245.76, 436,871.52 and 80,884.80 is: 121,328.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,245.76 : 436,871.52 = 80,884.80 : x
  2. Step 2: Convert to fraction form
    291,245.76/436,871.52 = 80,884.80/x
  3. Step 3: Cross multiply
    291,245.76x = 436,871.52 × 80,884.80
  4. Step 4: Simplify right side
    291,245.76x = 35,336,265,520.90
  5. Step 5: Solve for x
    x = 35,336,265,520.90/291,245.76
  6. Step 6: Final answer
    x = 121,328.00

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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.