Finding the Fourth Proportional to 1,138,311.52, 1,570,808.21 and 628,981.09
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Solution
The fourth proportional to 1,138,311.52, 1,570,808.21 and 628,981.09 is: 867,959.82
Step by Step Solution
- Step 1: Write the proportion equation
1,138,311.52 : 1,570,808.21 = 628,981.09 : x - Step 2: Convert to fraction form
1,138,311.52/1,570,808.21 = 628,981.09/x - Step 3: Cross multiply
1,138,311.52x = 1,570,808.21 × 628,981.09 - Step 4: Simplify right side
1,138,311.52x = 988,008,660,106.75 - Step 5: Solve for x
x = 988,008,660,106.75/1,138,311.52 - Step 6: Final answer
x = 867,959.82
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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.