Finding the Fourth Proportional to 1,122,349,121.82, 1,548,779,312.52 and 620,528,893.56
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Solution
The fourth proportional to 1,122,349,121.82, 1,548,779,312.52 and 620,528,893.56 is: 856,295,331.36
Step by Step Solution
- Step 1: Write the proportion equation
1,122,349,121.82 : 1,548,779,312.52 = 620,528,893.56 : x - Step 2: Convert to fraction form
1,122,349,121.82/1,548,779,312.52 = 620,528,893.56/x - Step 3: Cross multiply
1,122,349,121.82x = 1,548,779,312.52 × 620,528,893.56 - Step 4: Simplify right side
1,122,349,121.82x = 961,062,313,166,652,928 - Step 5: Solve for x
x = 961,062,313,166,652,928/1,122,349,121.82 - Step 6: Final answer
x = 856,295,331.36
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Double scale
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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.