Finding the Fourth Proportional to 1,289,394,068.32, 1,779,346,793.52 and 717,173,261.92
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Solution
The fourth proportional to 1,289,394,068.32, 1,779,346,793.52 and 717,173,261.92 is: 989,689,634.34
Step by Step Solution
- Step 1: Write the proportion equation
1,289,394,068.32 : 1,779,346,793.52 = 717,173,261.92 : x - Step 2: Convert to fraction form
1,289,394,068.32/1,779,346,793.52 = 717,173,261.92/x - Step 3: Cross multiply
1,289,394,068.32x = 1,779,346,793.52 × 717,173,261.92 - Step 4: Simplify right side
1,289,394,068.32x = 1,276,099,943,995,631,104 - Step 5: Solve for x
x = 1,276,099,943,995,631,104/1,289,394,068.32 - Step 6: Final answer
x = 989,689,634.34
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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.