Finding the Fourth Proportional to 1,991,965,719.40, 2,987,948,579.10 and 1,303,995,005.80
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Solution
The fourth proportional to 1,991,965,719.40, 2,987,948,579.10 and 1,303,995,005.80 is: 1,955,992,508.70
Step by Step Solution
- Step 1: Write the proportion equation
1,991,965,719.40 : 2,987,948,579.10 = 1,303,995,005.80 : x - Step 2: Convert to fraction form
1,991,965,719.40/2,987,948,579.10 = 1,303,995,005.80/x - Step 3: Cross multiply
1,991,965,719.40x = 2,987,948,579.10 × 1,303,995,005.80 - Step 4: Simplify right side
1,991,965,719.40x = 3,896,270,024,733,605,888 - Step 5: Solve for x
x = 3,896,270,024,733,605,888/1,991,965,719.40 - Step 6: Final answer
x = 1,955,992,508.70
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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.