Finding the Fourth Proportional to 257,643.68, 386,474.16 and 77,737.28
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Solution
The fourth proportional to 257,643.68, 386,474.16 and 77,737.28 is: 116,608.53
Step by Step Solution
- Step 1: Write the proportion equation
257,643.68 : 386,474.16 = 77,737.28 : x - Step 2: Convert to fraction form
257,643.68/386,474.16 = 77,737.28/x - Step 3: Cross multiply
257,643.68x = 386,474.16 × 77,737.28 - Step 4: Simplify right side
257,643.68x = 30,043,449,988.68 - Step 5: Solve for x
x = 30,043,449,988.68/257,643.68 - Step 6: Final answer
x = 116,608.53
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.