Finding the Fourth Proportional to 1,528,878.21, 2,109,853.26 and 840,561.78
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Solution
The fourth proportional to 1,528,878.21, 2,109,853.26 and 840,561.78 is: 1,159,975.99
Step by Step Solution
- Step 1: Write the proportion equation
1,528,878.21 : 2,109,853.26 = 840,561.78 : x - Step 2: Convert to fraction form
1,528,878.21/2,109,853.26 = 840,561.78/x - Step 3: Cross multiply
1,528,878.21x = 2,109,853.26 × 840,561.78 - Step 4: Simplify right side
1,528,878.21x = 1,773,462,011,764.40 - Step 5: Solve for x
x = 1,773,462,011,764.40/1,528,878.21 - Step 6: Final answer
x = 1,159,975.99
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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.