Finding the Fourth Proportional to 201,965.40, 302,948.10 and 138,979.80
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Solution
The fourth proportional to 201,965.40, 302,948.10 and 138,979.80 is: 208,469.70
Step by Step Solution
- Step 1: Write the proportion equation
201,965.40 : 302,948.10 = 138,979.80 : x - Step 2: Convert to fraction form
201,965.40/302,948.10 = 138,979.80/x - Step 3: Cross multiply
201,965.40x = 302,948.10 × 138,979.80 - Step 4: Simplify right side
201,965.40x = 42,103,666,348.38 - Step 5: Solve for x
x = 42,103,666,348.38/201,965.40 - Step 6: Final answer
x = 208,469.70
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1.5x scale
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.