Finding the Fourth Proportional to 210.93, 290.99 and 128.01
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Solution
The fourth proportional to 210.93, 290.99 and 128.01 is: 176.59
Step by Step Solution
- Step 1: Write the proportion equation
210.93 : 290.99 = 128.01 : x - Step 2: Convert to fraction form
210.93/290.99 = 128.01/x - Step 3: Cross multiply
210.93x = 290.99 × 128.01 - Step 4: Simplify right side
210.93x = 37,248.99 - Step 5: Solve for x
x = 37,248.99/210.93 - Step 6: Final answer
x = 176.59
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.