Finding the Fourth Proportional to 1,122,349,121.32, 1,548,779,311.83 and 620,528,893.06
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Solution
The fourth proportional to 1,122,349,121.32, 1,548,779,311.83 and 620,528,893.06 is: 856,295,330.67
Step by Step Solution
- Step 1: Write the proportion equation
1,122,349,121.32 : 1,548,779,311.83 = 620,528,893.06 : x - Step 2: Convert to fraction form
1,122,349,121.32/1,548,779,311.83 = 620,528,893.06/x - Step 3: Cross multiply
1,122,349,121.32x = 1,548,779,311.83 × 620,528,893.06 - Step 4: Simplify right side
1,122,349,121.32x = 961,062,311,964,098,304 - Step 5: Solve for x
x = 961,062,311,964,098,304/1,122,349,121.32 - Step 6: Final answer
x = 856,295,330.67
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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.