Finding the Fourth Proportional to 1,987,908.09, 2,979,103.40 and 905,776.06
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Solution
The fourth proportional to 1,987,908.09, 2,979,103.40 and 905,776.06 is: 1,357,407.09
Step by Step Solution
- Step 1: Write the proportion equation
1,987,908.09 : 2,979,103.40 = 905,776.06 : x - Step 2: Convert to fraction form
1,987,908.09/2,979,103.40 = 905,776.06/x - Step 3: Cross multiply
1,987,908.09x = 2,979,103.40 × 905,776.06 - Step 4: Simplify right side
1,987,908.09x = 2,698,400,545,972.92 - Step 5: Solve for x
x = 2,698,400,545,972.92/1,987,908.09 - Step 6: Final answer
x = 1,357,407.09
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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.