Finding the Fourth Proportional to 1,225,211.28, 1,690,543.80 and 715,815.24
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Solution
The fourth proportional to 1,225,211.28, 1,690,543.80 and 715,815.24 is: 987,680.28
Step by Step Solution
- Step 1: Write the proportion equation
1,225,211.28 : 1,690,543.80 = 715,815.24 : x - Step 2: Convert to fraction form
1,225,211.28/1,690,543.80 = 715,815.24/x - Step 3: Cross multiply
1,225,211.28x = 1,690,543.80 × 715,815.24 - Step 4: Simplify right side
1,225,211.28x = 1,210,117,015,927.51 - Step 5: Solve for x
x = 1,210,117,015,927.51/1,225,211.28 - Step 6: Final answer
x = 987,680.28
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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.