Finding the Fourth Proportional to 1,278,515.68, 1,918,155.12 and 379,987.36
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Solution
The fourth proportional to 1,278,515.68, 1,918,155.12 and 379,987.36 is: 570,094.46
Step by Step Solution
- Step 1: Write the proportion equation
1,278,515.68 : 1,918,155.12 = 379,987.36 : x - Step 2: Convert to fraction form
1,278,515.68/1,918,155.12 = 379,987.36/x - Step 3: Cross multiply
1,278,515.68x = 1,918,155.12 × 379,987.36 - Step 4: Simplify right side
1,278,515.68x = 728,874,700,119.28 - Step 5: Solve for x
x = 728,874,700,119.28/1,278,515.68 - Step 6: Final answer
x = 570,094.46
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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.