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Finding the Fourth Proportional to 290,988.45, 436,481.46 and 80,625.78

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Solution

The fourth proportional to 290,988.45, 436,481.46 and 80,625.78 is: 120,938.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,988.45 : 436,481.46 = 80,625.78 : x
  2. Step 2: Convert to fraction form
    290,988.45/436,481.46 = 80,625.78/x
  3. Step 3: Cross multiply
    290,988.45x = 436,481.46 × 80,625.78
  4. Step 4: Simplify right side
    290,988.45x = 35,191,658,168.04
  5. Step 5: Solve for x
    x = 35,191,658,168.04/290,988.45
  6. Step 6: Final answer
    x = 120,938.33

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1.5x scale

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.