Finding the Fourth Proportional to 825,540,989.07, 1,139,212,181.34 and 449,199,054.75
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Solution
The fourth proportional to 825,540,989.07, 1,139,212,181.34 and 449,199,054.75 is: 619,875,986.53
Step by Step Solution
- Step 1: Write the proportion equation
825,540,989.07 : 1,139,212,181.34 = 449,199,054.75 : x - Step 2: Convert to fraction form
825,540,989.07/1,139,212,181.34 = 449,199,054.75/x - Step 3: Cross multiply
825,540,989.07x = 1,139,212,181.34 × 449,199,054.75 - Step 4: Simplify right side
825,540,989.07x = 511,733,035,017,613,568 - Step 5: Solve for x
x = 511,733,035,017,613,568/825,540,989.07 - Step 6: Final answer
x = 619,875,986.53
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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.