Finding the Fourth Proportional to 420.97, 631.52 and 146.99
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Solution
The fourth proportional to 420.97, 631.52 and 146.99 is: 220.51
Step by Step Solution
- Step 1: Write the proportion equation
420.97 : 631.52 = 146.99 : x - Step 2: Convert to fraction form
420.97/631.52 = 146.99/x - Step 3: Cross multiply
420.97x = 631.52 × 146.99 - Step 4: Simplify right side
420.97x = 92,827.12 - Step 5: Solve for x
x = 92,827.12/420.97 - Step 6: Final answer
x = 220.51
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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.