Finding the Fourth Proportional to 1,990,656,824.80, 2,985,985,237.20 and 1,119,943,890.40
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Solution
The fourth proportional to 1,990,656,824.80, 2,985,985,237.20 and 1,119,943,890.40 is: 1,679,915,835.60
Step by Step Solution
- Step 1: Write the proportion equation
1,990,656,824.80 : 2,985,985,237.20 = 1,119,943,890.40 : x - Step 2: Convert to fraction form
1,990,656,824.80/2,985,985,237.20 = 1,119,943,890.40/x - Step 3: Cross multiply
1,990,656,824.80x = 2,985,985,237.20 × 1,119,943,890.40 - Step 4: Simplify right side
1,990,656,824.80x = 3,344,135,923,226,735,104 - Step 5: Solve for x
x = 3,344,135,923,226,735,104/1,990,656,824.80 - Step 6: Final answer
x = 1,679,915,835.60
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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.