Finding the Fourth Proportional to 420.12, 630.37 and 188.99
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Solution
The fourth proportional to 420.12, 630.37 and 188.99 is: 283.57
Step by Step Solution
- Step 1: Write the proportion equation
420.12 : 630.37 = 188.99 : x - Step 2: Convert to fraction form
420.12/630.37 = 188.99/x - Step 3: Cross multiply
420.12x = 630.37 × 188.99 - Step 4: Simplify right side
420.12x = 119,133.63 - Step 5: Solve for x
x = 119,133.63/420.12 - Step 6: Final answer
x = 283.57
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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.