Finding the Fourth Proportional to 1,438.08, 2,157.44 and 412
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Solution
The fourth proportional to 1,438.08, 2,157.44 and 412 is: 618.09
Step by Step Solution
- Step 1: Write the proportion equation
1,438.08 : 2,157.44 = 412 : x - Step 2: Convert to fraction form
1,438.08/2,157.44 = 412/x - Step 3: Cross multiply
1,438.08x = 2,157.44 × 412 - Step 4: Simplify right side
1,438.08x = 888,865.28 - Step 5: Solve for x
x = 888,865.28/1,438.08 - Step 6: Final answer
x = 618.09
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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.