Finding the Fourth Proportional to 908,078,412.60, 1,253,148,197.91 and 490,390,660.99
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Solution
The fourth proportional to 908,078,412.60, 1,253,148,197.91 and 490,390,660.99 is: 676,739,105.97
Step by Step Solution
- Step 1: Write the proportion equation
908,078,412.60 : 1,253,148,197.91 = 490,390,660.99 : x - Step 2: Convert to fraction form
908,078,412.60/1,253,148,197.91 = 490,390,660.99/x - Step 3: Cross multiply
908,078,412.60x = 1,253,148,197.91 × 490,390,660.99 - Step 4: Simplify right side
908,078,412.60x = 614,532,173,091,215,104 - Step 5: Solve for x
x = 614,532,173,091,215,104/908,078,412.60 - Step 6: Final answer
x = 676,739,105.97
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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.