Finding the Fourth Proportional to 1,189.62, 1,641.06 and 692.28
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Solution
The fourth proportional to 1,189.62, 1,641.06 and 692.28 is: 954.99
Step by Step Solution
- Step 1: Write the proportion equation
1,189.62 : 1,641.06 = 692.28 : x - Step 2: Convert to fraction form
1,189.62/1,641.06 = 692.28/x - Step 3: Cross multiply
1,189.62x = 1,641.06 × 692.28 - Step 4: Simplify right side
1,189.62x = 1,136,073.02 - Step 5: Solve for x
x = 1,136,073.02/1,189.62 - Step 6: Final answer
x = 954.99
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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.