Finding the Fourth Proportional to 210,386.57, 290,337.21 and 128,728.44
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Solution
The fourth proportional to 210,386.57, 290,337.21 and 128,728.44 is: 177,647.54
Step by Step Solution
- Step 1: Write the proportion equation
210,386.57 : 290,337.21 = 128,728.44 : x - Step 2: Convert to fraction form
210,386.57/290,337.21 = 128,728.44/x - Step 3: Cross multiply
210,386.57x = 290,337.21 × 128,728.44 - Step 4: Simplify right side
210,386.57x = 37,374,656,117.25 - Step 5: Solve for x
x = 37,374,656,117.25/210,386.57 - Step 6: Final answer
x = 177,647.54
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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.