Finding the Fourth Proportional to 279.99, 420.04 and 84.99
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Solution
The fourth proportional to 279.99, 420.04 and 84.99 is: 127.51
Step by Step Solution
- Step 1: Write the proportion equation
279.99 : 420.04 = 84.99 : x - Step 2: Convert to fraction form
279.99/420.04 = 84.99/x - Step 3: Cross multiply
279.99x = 420.04 × 84.99 - Step 4: Simplify right side
279.99x = 35,700.88 - Step 5: Solve for x
x = 35,700.88/279.99 - Step 6: Final answer
x = 127.51
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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.