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Finding the Fourth Proportional to 800,450.60, 1,200,855 and 421,549.72

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Solution

The fourth proportional to 800,450.60, 1,200,855 and 421,549.72 is: 632,418.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,450.60 : 1,200,855 = 421,549.72 : x
  2. Step 2: Convert to fraction form
    800,450.60/1,200,855 = 421,549.72/x
  3. Step 3: Cross multiply
    800,450.60x = 1,200,855 × 421,549.72
  4. Step 4: Simplify right side
    800,450.60x = 506,220,089,010.60
  5. Step 5: Solve for x
    x = 506,220,089,010.60/800,450.60
  6. Step 6: Final answer
    x = 632,418.90

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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.