Finding the Fourth Proportional to 1,987,479.12, 2,742,721.74 and 1,116,315.18
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Solution
The fourth proportional to 1,987,479.12, 2,742,721.74 and 1,116,315.18 is: 1,540,515.26
Step by Step Solution
- Step 1: Write the proportion equation
1,987,479.12 : 2,742,721.74 = 1,116,315.18 : x - Step 2: Convert to fraction form
1,987,479.12/2,742,721.74 = 1,116,315.18/x - Step 3: Cross multiply
1,987,479.12x = 2,742,721.74 × 1,116,315.18 - Step 4: Simplify right side
1,987,479.12x = 3,061,741,912,878.01 - Step 5: Solve for x
x = 3,061,741,912,878.01/1,987,479.12 - Step 6: Final answer
x = 1,540,515.26
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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.