Finding the Fourth Proportional to 309,988.24, 427,985.48 and 189,199.55
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Solution
The fourth proportional to 309,988.24, 427,985.48 and 189,199.55 is: 261,218.49
Step by Step Solution
- Step 1: Write the proportion equation
309,988.24 : 427,985.48 = 189,199.55 : x - Step 2: Convert to fraction form
309,988.24/427,985.48 = 189,199.55/x - Step 3: Cross multiply
309,988.24x = 427,985.48 × 189,199.55 - Step 4: Simplify right side
309,988.24x = 80,974,660,222.53 - Step 5: Solve for x
x = 80,974,660,222.53/309,988.24 - Step 6: Final answer
x = 261,218.49
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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.