Finding the Fourth Proportional to 918,537.10, 1,268,199.75 and 821,439.70
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Solution
The fourth proportional to 918,537.10, 1,268,199.75 and 821,439.70 is: 1,134,139.95
Step by Step Solution
- Step 1: Write the proportion equation
918,537.10 : 1,268,199.75 = 821,439.70 : x - Step 2: Convert to fraction form
918,537.10/1,268,199.75 = 821,439.70/x - Step 3: Cross multiply
918,537.10x = 1,268,199.75 × 821,439.70 - Step 4: Simplify right side
918,537.10x = 1,041,749,622,089.97 - Step 5: Solve for x
x = 1,041,749,622,089.97/918,537.10 - Step 6: Final answer
x = 1,134,139.95
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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.