Finding the Fourth Proportional to 472.70, 663.70 and 472.70
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Solution
The fourth proportional to 472.70, 663.70 and 472.70 is: 663.70
Step by Step Solution
- Step 1: Write the proportion equation
472.70 : 663.70 = 472.70 : x - Step 2: Convert to fraction form
472.70/663.70 = 472.70/x - Step 3: Cross multiply
472.70x = 663.70 × 472.70 - Step 4: Simplify right side
472.70x = 313,730.99 - Step 5: Solve for x
x = 313,730.99/472.70 - Step 6: Final answer
x = 663.70
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Why These Related Problems?
These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.