Finding the Fourth Proportional to 309,809.20, 427,809.34 and 193,721.62
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Solution
The fourth proportional to 309,809.20, 427,809.34 and 193,721.62 is: 267,506.32
Step by Step Solution
- Step 1: Write the proportion equation
309,809.20 : 427,809.34 = 193,721.62 : x - Step 2: Convert to fraction form
309,809.20/427,809.34 = 193,721.62/x - Step 3: Cross multiply
309,809.20x = 427,809.34 × 193,721.62 - Step 4: Simplify right side
309,809.20x = 82,875,918,395.93 - Step 5: Solve for x
x = 82,875,918,395.93/309,809.20 - Step 6: Final answer
x = 267,506.32
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1.5x scale
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.