Finding the Fourth Proportional to 949.18, 1,424.70 and 640
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Solution
The fourth proportional to 949.18, 1,424.70 and 640 is: 960.63
Step by Step Solution
- Step 1: Write the proportion equation
949.18 : 1,424.70 = 640 : x - Step 2: Convert to fraction form
949.18/1,424.70 = 640/x - Step 3: Cross multiply
949.18x = 1,424.70 × 640 - Step 4: Simplify right side
949.18x = 911,808 - Step 5: Solve for x
x = 911,808/949.18 - Step 6: Final answer
x = 960.63
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.