Finding the Fourth Proportional to 1,122,939.21, 1,549,931.49 and 639,789.24
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Solution
The fourth proportional to 1,122,939.21, 1,549,931.49 and 639,789.24 is: 883,066.05
Step by Step Solution
- Step 1: Write the proportion equation
1,122,939.21 : 1,549,931.49 = 639,789.24 : x - Step 2: Convert to fraction form
1,122,939.21/1,549,931.49 = 639,789.24/x - Step 3: Cross multiply
1,122,939.21x = 1,549,931.49 × 639,789.24 - Step 4: Simplify right side
1,122,939.21x = 991,629,490,039.17 - Step 5: Solve for x
x = 991,629,490,039.17/1,122,939.21 - Step 6: Final answer
x = 883,066.05
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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.