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Finding the Fourth Proportional to 290,763, 436,095.36 and 80,401.68

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Solution

The fourth proportional to 290,763, 436,095.36 and 80,401.68 is: 120,588.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,763 : 436,095.36 = 80,401.68 : x
  2. Step 2: Convert to fraction form
    290,763/436,095.36 = 80,401.68/x
  3. Step 3: Cross multiply
    290,763x = 436,095.36 × 80,401.68
  4. Step 4: Simplify right side
    290,763x = 35,062,799,584.20
  5. Step 5: Solve for x
    x = 35,062,799,584.20/290,763
  6. Step 6: Final answer
    x = 120,588.93

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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.