Finding the Fourth Proportional to 3,897,697.49, 5,378,857.28 and 2,155,484.09
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Solution
The fourth proportional to 3,897,697.49, 5,378,857.28 and 2,155,484.09 is: 2,974,587.25
Step by Step Solution
- Step 1: Write the proportion equation
3,897,697.49 : 5,378,857.28 = 2,155,484.09 : x - Step 2: Convert to fraction form
3,897,697.49/5,378,857.28 = 2,155,484.09/x - Step 3: Cross multiply
3,897,697.49x = 5,378,857.28 × 2,155,484.09 - Step 4: Simplify right side
3,897,697.49x = 11,594,041,251,748.97 - Step 5: Solve for x
x = 11,594,041,251,748.97/3,897,697.49 - Step 6: Final answer
x = 2,974,587.25
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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.