Finding the Fourth Proportional to 989.18, 1,364.36 and 657.44
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Solution
The fourth proportional to 989.18, 1,364.36 and 657.44 is: 906.80
Step by Step Solution
- Step 1: Write the proportion equation
989.18 : 1,364.36 = 657.44 : x - Step 2: Convert to fraction form
989.18/1,364.36 = 657.44/x - Step 3: Cross multiply
989.18x = 1,364.36 × 657.44 - Step 4: Simplify right side
989.18x = 896,984.84 - Step 5: Solve for x
x = 896,984.84/989.18 - Step 6: Final answer
x = 906.80
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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.