Finding the Fourth Proportional to 155.62, 214.68 and 147.70
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Solution
The fourth proportional to 155.62, 214.68 and 147.70 is: 203.75
Step by Step Solution
- Step 1: Write the proportion equation
155.62 : 214.68 = 147.70 : x - Step 2: Convert to fraction form
155.62/214.68 = 147.70/x - Step 3: Cross multiply
155.62x = 214.68 × 147.70 - Step 4: Simplify right side
155.62x = 31,708.24 - Step 5: Solve for x
x = 31,708.24/155.62 - Step 6: Final answer
x = 203.75
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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.