Finding the Fourth Proportional to 1,289,394,260.91, 1,779,347,059.07 and 717,173,454.51
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Solution
The fourth proportional to 1,289,394,260.91, 1,779,347,059.07 and 717,173,454.51 is: 989,689,899.99
Step by Step Solution
- Step 1: Write the proportion equation
1,289,394,260.91 : 1,779,347,059.07 = 717,173,454.51 : x - Step 2: Convert to fraction form
1,289,394,260.91/1,779,347,059.07 = 717,173,454.51/x - Step 3: Cross multiply
1,289,394,260.91x = 1,779,347,059.07 × 717,173,454.51 - Step 4: Simplify right side
1,289,394,260.91x = 1,276,100,477,121,854,976 - Step 5: Solve for x
x = 1,276,100,477,121,854,976/1,289,394,260.91 - Step 6: Final answer
x = 989,689,899.99
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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.