Finding the Fourth Proportional to 1,390,143.09, 2,084,812.05 and 417,468.18
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Solution
The fourth proportional to 1,390,143.09, 2,084,812.05 and 417,468.18 is: 626,081.37
Step by Step Solution
- Step 1: Write the proportion equation
1,390,143.09 : 2,084,812.05 = 417,468.18 : x - Step 2: Convert to fraction form
1,390,143.09/2,084,812.05 = 417,468.18/x - Step 3: Cross multiply
1,390,143.09x = 2,084,812.05 × 417,468.18 - Step 4: Simplify right side
1,390,143.09x = 870,342,692,155.57 - Step 5: Solve for x
x = 870,342,692,155.57/1,390,143.09 - Step 6: Final answer
x = 626,081.37
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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.