Finding the Fourth Proportional to 1,390,219.70, 1,918,532.33 and 786,607.70
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Solution
The fourth proportional to 1,390,219.70, 1,918,532.33 and 786,607.70 is: 1,085,535.11
Step by Step Solution
- Step 1: Write the proportion equation
1,390,219.70 : 1,918,532.33 = 786,607.70 : x - Step 2: Convert to fraction form
1,390,219.70/1,918,532.33 = 786,607.70/x - Step 3: Cross multiply
1,390,219.70x = 1,918,532.33 × 786,607.70 - Step 4: Simplify right side
1,390,219.70x = 1,509,132,289,951.24 - Step 5: Solve for x
x = 1,509,132,289,951.24/1,390,219.70 - Step 6: Final answer
x = 1,085,535.11
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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.