Finding the Fourth Proportional to 1,247,802,336.81, 1,722,021,032.99 and 690,885,433.08
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Solution
The fourth proportional to 1,247,802,336.81, 1,722,021,032.99 and 690,885,433.08 is: 953,451,690.27
Step by Step Solution
- Step 1: Write the proportion equation
1,247,802,336.81 : 1,722,021,032.99 = 690,885,433.08 : x - Step 2: Convert to fraction form
1,247,802,336.81/1,722,021,032.99 = 690,885,433.08/x - Step 3: Cross multiply
1,247,802,336.81x = 1,722,021,032.99 × 690,885,433.08 - Step 4: Simplify right side
1,247,802,336.81x = 1,189,719,247,150,165,248 - Step 5: Solve for x
x = 1,189,719,247,150,165,248/1,247,802,336.81 - Step 6: Final answer
x = 953,451,690.27
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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.