Finding the Fourth Proportional to 1,991,613,170.54, 2,987,378,731.77 and 663,737,641.02
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Solution
The fourth proportional to 1,991,613,170.54, 2,987,378,731.77 and 663,737,641.02 is: 995,592,789.60
Step by Step Solution
- Step 1: Write the proportion equation
1,991,613,170.54 : 2,987,378,731.77 = 663,737,641.02 : x - Step 2: Convert to fraction form
1,991,613,170.54/2,987,378,731.77 = 663,737,641.02/x - Step 3: Cross multiply
1,991,613,170.54x = 2,987,378,731.77 × 663,737,641.02 - Step 4: Simplify right side
1,991,613,170.54x = 1,982,835,712,258,339,072 - Step 5: Solve for x
x = 1,982,835,712,258,339,072/1,991,613,170.54 - Step 6: Final answer
x = 995,592,789.60
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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.