Finding the Fourth Proportional to 918,538.10, 1,268,201.13 and 821,440.70
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Solution
The fourth proportional to 918,538.10, 1,268,201.13 and 821,440.70 is: 1,134,141.33
Step by Step Solution
- Step 1: Write the proportion equation
918,538.10 : 1,268,201.13 = 821,440.70 : x - Step 2: Convert to fraction form
918,538.10/1,268,201.13 = 821,440.70/x - Step 3: Cross multiply
918,538.10x = 1,268,201.13 × 821,440.70 - Step 4: Simplify right side
918,538.10x = 1,041,752,023,967.99 - Step 5: Solve for x
x = 1,041,752,023,967.99/918,538.10 - Step 6: Final answer
x = 1,134,141.33
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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.