Finding the Fourth Proportional to 369.99, 554.99 and 138.90
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Solution
The fourth proportional to 369.99, 554.99 and 138.90 is: 208.35
Step by Step Solution
- Step 1: Write the proportion equation
369.99 : 554.99 = 138.90 : x - Step 2: Convert to fraction form
369.99/554.99 = 138.90/x - Step 3: Cross multiply
369.99x = 554.99 × 138.90 - Step 4: Simplify right side
369.99x = 77,088.11 - Step 5: Solve for x
x = 77,088.11/369.99 - Step 6: Final answer
x = 208.35
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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.