Finding the Fourth Proportional to 3,128,739.21, 4,691,993.45 and 1,421,452.19
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Solution
The fourth proportional to 3,128,739.21, 4,691,993.45 and 1,421,452.19 is: 2,131,671.55
Step by Step Solution
- Step 1: Write the proportion equation
3,128,739.21 : 4,691,993.45 = 1,421,452.19 : x - Step 2: Convert to fraction form
3,128,739.21/4,691,993.45 = 1,421,452.19/x - Step 3: Cross multiply
3,128,739.21x = 4,691,993.45 × 1,421,452.19 - Step 4: Simplify right side
3,128,739.21x = 6,669,444,369,590.88 - Step 5: Solve for x
x = 6,669,444,369,590.88/3,128,739.21 - Step 6: Final answer
x = 2,131,671.55
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.