Finding the Fourth Proportional to 421.98, 632.99 and 147.99
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Solution
The fourth proportional to 421.98, 632.99 and 147.99 is: 221.99
Step by Step Solution
- Step 1: Write the proportion equation
421.98 : 632.99 = 147.99 : x - Step 2: Convert to fraction form
421.98/632.99 = 147.99/x - Step 3: Cross multiply
421.98x = 632.99 × 147.99 - Step 4: Simplify right side
421.98x = 93,673.40 - Step 5: Solve for x
x = 93,673.40/421.98 - Step 6: Final answer
x = 221.99
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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.