Finding the Fourth Proportional to 1,987,918.10, 2,979,118.40 and 905,786.08
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Solution
The fourth proportional to 1,987,918.10, 2,979,118.40 and 905,786.08 is: 1,357,422.11
Step by Step Solution
- Step 1: Write the proportion equation
1,987,918.10 : 2,979,118.40 = 905,786.08 : x - Step 2: Convert to fraction form
1,987,918.10/2,979,118.40 = 905,786.08/x - Step 3: Cross multiply
1,987,918.10x = 2,979,118.40 × 905,786.08 - Step 4: Simplify right side
1,987,918.10x = 2,698,443,977,391.87 - Step 5: Solve for x
x = 2,698,443,977,391.87/1,987,918.10 - Step 6: Final answer
x = 1,357,422.11
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.