Finding the Fourth Proportional to 1,911,907.74, 2,638,989.84 and 1,249,715.80
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Solution
The fourth proportional to 1,911,907.74, 2,638,989.84 and 1,249,715.80 is: 1,724,971.99
Step by Step Solution
- Step 1: Write the proportion equation
1,911,907.74 : 2,638,989.84 = 1,249,715.80 : x - Step 2: Convert to fraction form
1,911,907.74/2,638,989.84 = 1,249,715.80/x - Step 3: Cross multiply
1,911,907.74x = 2,638,989.84 × 1,249,715.80 - Step 4: Simplify right side
1,911,907.74x = 3,297,987,299,087.47 - Step 5: Solve for x
x = 3,297,987,299,087.47/1,911,907.74 - Step 6: Final answer
x = 1,724,971.99
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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.