Finding the Fourth Proportional to 1,328,879,672.70, 1,993,319,509.05 and 638,620,482.30
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Solution
The fourth proportional to 1,328,879,672.70, 1,993,319,509.05 and 638,620,482.30 is: 957,930,723.45
Step by Step Solution
- Step 1: Write the proportion equation
1,328,879,672.70 : 1,993,319,509.05 = 638,620,482.30 : x - Step 2: Convert to fraction form
1,328,879,672.70/1,993,319,509.05 = 638,620,482.30/x - Step 3: Cross multiply
1,328,879,672.70x = 1,993,319,509.05 × 638,620,482.30 - Step 4: Simplify right side
1,328,879,672.70x = 1,272,974,666,247,510,016 - Step 5: Solve for x
x = 1,272,974,666,247,510,016/1,328,879,672.70 - Step 6: Final answer
x = 957,930,723.45
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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.