Finding the Fourth Proportional to 345.40, 476.08 and 279.79
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Solution
The fourth proportional to 345.40, 476.08 and 279.79 is: 385.65
Step by Step Solution
- Step 1: Write the proportion equation
345.40 : 476.08 = 279.79 : x - Step 2: Convert to fraction form
345.40/476.08 = 279.79/x - Step 3: Cross multiply
345.40x = 476.08 × 279.79 - Step 4: Simplify right side
345.40x = 133,202.42 - Step 5: Solve for x
x = 133,202.42/345.40 - Step 6: Final answer
x = 385.65
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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.