Finding the Fourth Proportional to 1,440,908.21, 1,988,643.42 and 1,393,590.65
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Solution
The fourth proportional to 1,440,908.21, 1,988,643.42 and 1,393,590.65 is: 1,923,338.93
Step by Step Solution
- Step 1: Write the proportion equation
1,440,908.21 : 1,988,643.42 = 1,393,590.65 : x - Step 2: Convert to fraction form
1,440,908.21/1,988,643.42 = 1,393,590.65/x - Step 3: Cross multiply
1,440,908.21x = 1,988,643.42 × 1,393,590.65 - Step 4: Simplify right side
1,440,908.21x = 2,771,354,866,352.81 - Step 5: Solve for x
x = 2,771,354,866,352.81/1,440,908.21 - Step 6: Final answer
x = 1,923,338.93
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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.