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Finding the Fourth Proportional to 291,308.46, 436,986.49 and 80,946.46

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Solution

The fourth proportional to 291,308.46, 436,986.49 and 80,946.46 is: 121,426.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,308.46 : 436,986.49 = 80,946.46 : x
  2. Step 2: Convert to fraction form
    291,308.46/436,986.49 = 80,946.46/x
  3. Step 3: Cross multiply
    291,308.46x = 436,986.49 × 80,946.46
  4. Step 4: Simplify right side
    291,308.46x = 35,372,509,433.33
  5. Step 5: Solve for x
    x = 35,372,509,433.33/291,308.46
  6. Step 6: Final answer
    x = 121,426.30

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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.