Finding the Fourth Proportional to 420,198.13, 630,302.68 and 139,715.38
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Solution
The fourth proportional to 420,198.13, 630,302.68 and 139,715.38 is: 209,574.89
Step by Step Solution
- Step 1: Write the proportion equation
420,198.13 : 630,302.68 = 139,715.38 : x - Step 2: Convert to fraction form
420,198.13/630,302.68 = 139,715.38/x - Step 3: Cross multiply
420,198.13x = 630,302.68 × 139,715.38 - Step 4: Simplify right side
420,198.13x = 88,062,975,299.71 - Step 5: Solve for x
x = 88,062,975,299.71/420,198.13 - Step 6: Final answer
x = 209,574.89
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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.