Finding the Fourth Proportional to 1,107,140.16, 1,528,138.44 and 720,919.61
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Solution
The fourth proportional to 1,107,140.16, 1,528,138.44 and 720,919.61 is: 995,054.65
Step by Step Solution
- Step 1: Write the proportion equation
1,107,140.16 : 1,528,138.44 = 720,919.61 : x - Step 2: Convert to fraction form
1,107,140.16/1,528,138.44 = 720,919.61/x - Step 3: Cross multiply
1,107,140.16x = 1,528,138.44 × 720,919.61 - Step 4: Simplify right side
1,107,140.16x = 1,101,664,960,550.12 - Step 5: Solve for x
x = 1,101,664,960,550.12/1,107,140.16 - Step 6: Final answer
x = 995,054.65
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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.