Finding the Fourth Proportional to 1,138,278.18, 1,570,762.20 and 628,947.75
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Solution
The fourth proportional to 1,138,278.18, 1,570,762.20 and 628,947.75 is: 867,913.81
Step by Step Solution
- Step 1: Write the proportion equation
1,138,278.18 : 1,570,762.20 = 628,947.75 : x - Step 2: Convert to fraction form
1,138,278.18/1,570,762.20 = 628,947.75/x - Step 3: Cross multiply
1,138,278.18x = 1,570,762.20 × 628,947.75 - Step 4: Simplify right side
1,138,278.18x = 987,927,351,475.05 - Step 5: Solve for x
x = 987,927,351,475.05/1,138,278.18 - Step 6: Final answer
x = 867,913.81
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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.