Finding the Fourth Proportional to 919,873,559.20, 1,379,810,338.80 and 738,475,031.20
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Solution
The fourth proportional to 919,873,559.20, 1,379,810,338.80 and 738,475,031.20 is: 1,107,712,546.80
Step by Step Solution
- Step 1: Write the proportion equation
919,873,559.20 : 1,379,810,338.80 = 738,475,031.20 : x - Step 2: Convert to fraction form
919,873,559.20/1,379,810,338.80 = 738,475,031.20/x - Step 3: Cross multiply
919,873,559.20x = 1,379,810,338.80 × 738,475,031.20 - Step 4: Simplify right side
919,873,559.20x = 1,018,955,482,995,412,608 - Step 5: Solve for x
x = 1,018,955,482,995,412,608/919,873,559.20 - Step 6: Final answer
x = 1,107,712,546.80
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1.5x scale
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.