Finding the Fourth Proportional to 1,378.47, 2,068 and 453.99
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Solution
The fourth proportional to 1,378.47, 2,068 and 453.99 is: 681.08
Step by Step Solution
- Step 1: Write the proportion equation
1,378.47 : 2,068 = 453.99 : x - Step 2: Convert to fraction form
1,378.47/2,068 = 453.99/x - Step 3: Cross multiply
1,378.47x = 2,068 × 453.99 - Step 4: Simplify right side
1,378.47x = 938,840.98 - Step 5: Solve for x
x = 938,840.98/1,378.47 - Step 6: Final answer
x = 681.08
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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.