Finding the Fourth Proportional to 1,390,220.70, 1,918,533.71 and 786,608.70
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Solution
The fourth proportional to 1,390,220.70, 1,918,533.71 and 786,608.70 is: 1,085,536.50
Step by Step Solution
- Step 1: Write the proportion equation
1,390,220.70 : 1,918,533.71 = 786,608.70 : x - Step 2: Convert to fraction form
1,390,220.70/1,918,533.71 = 786,608.70/x - Step 3: Cross multiply
1,390,220.70x = 1,918,533.71 × 786,608.70 - Step 4: Simplify right side
1,390,220.70x = 1,509,135,307,529.28 - Step 5: Solve for x
x = 1,509,135,307,529.28/1,390,220.70 - Step 6: Final answer
x = 1,085,536.50
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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.