Finding the Fourth Proportional to 1,549,378.78, 2,138,144.24 and 861,115.08
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Solution
The fourth proportional to 1,549,378.78, 2,138,144.24 and 861,115.08 is: 1,188,339.65
Step by Step Solution
- Step 1: Write the proportion equation
1,549,378.78 : 2,138,144.24 = 861,115.08 : x - Step 2: Convert to fraction form
1,549,378.78/2,138,144.24 = 861,115.08/x - Step 3: Cross multiply
1,549,378.78x = 2,138,144.24 × 861,115.08 - Step 4: Simplify right side
1,549,378.78x = 1,841,188,240,409.38 - Step 5: Solve for x
x = 1,841,188,240,409.38/1,549,378.78 - Step 6: Final answer
x = 1,188,339.65
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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.