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Finding the Fourth Proportional to 291,307.46, 436,984.99 and 80,945.46

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Solution

The fourth proportional to 291,307.46, 436,984.99 and 80,945.46 is: 121,424.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,307.46 : 436,984.99 = 80,945.46 : x
  2. Step 2: Convert to fraction form
    291,307.46/436,984.99 = 80,945.46/x
  3. Step 3: Cross multiply
    291,307.46x = 436,984.99 × 80,945.46
  4. Step 4: Simplify right side
    291,307.46x = 35,371,951,028.65
  5. Step 5: Solve for x
    x = 35,371,951,028.65/291,307.46
  6. Step 6: Final answer
    x = 121,424.80

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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.