Finding the Fourth Proportional to 1,188.18, 1,638.16 and 814.52
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Solution
The fourth proportional to 1,188.18, 1,638.16 and 814.52 is: 1,122.99
Step by Step Solution
- Step 1: Write the proportion equation
1,188.18 : 1,638.16 = 814.52 : x - Step 2: Convert to fraction form
1,188.18/1,638.16 = 814.52/x - Step 3: Cross multiply
1,188.18x = 1,638.16 × 814.52 - Step 4: Simplify right side
1,188.18x = 1,334,314.08 - Step 5: Solve for x
x = 1,334,314.08/1,188.18 - Step 6: Final answer
x = 1,122.99
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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.