Finding the Fourth Proportional to 1,438,485,260.20, 1,985,109,583.26 and 778,435,538.20
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Solution
The fourth proportional to 1,438,485,260.20, 1,985,109,583.26 and 778,435,538.20 is: 1,074,241,001.69
Step by Step Solution
- Step 1: Write the proportion equation
1,438,485,260.20 : 1,985,109,583.26 = 778,435,538.20 : x - Step 2: Convert to fraction form
1,438,485,260.20/1,985,109,583.26 = 778,435,538.20/x - Step 3: Cross multiply
1,438,485,260.20x = 1,985,109,583.26 × 778,435,538.20 - Step 4: Simplify right side
1,438,485,260.20x = 1,545,279,846,830,976,000 - Step 5: Solve for x
x = 1,545,279,846,830,976,000/1,438,485,260.20 - Step 6: Final answer
x = 1,074,241,001.69
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.