Finding the Fourth Proportional to 830,090.70, 1,245,136.05 and 620,138.70
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Solution
The fourth proportional to 830,090.70, 1,245,136.05 and 620,138.70 is: 930,208.05
Step by Step Solution
- Step 1: Write the proportion equation
830,090.70 : 1,245,136.05 = 620,138.70 : x - Step 2: Convert to fraction form
830,090.70/1,245,136.05 = 620,138.70/x - Step 3: Cross multiply
830,090.70x = 1,245,136.05 × 620,138.70 - Step 4: Simplify right side
830,090.70x = 772,157,051,370.14 - Step 5: Solve for x
x = 772,157,051,370.14/830,090.70 - Step 6: Final answer
x = 930,208.05
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.