Finding the Fourth Proportional to 1,420, 2,130.08 and 394.08
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Solution
The fourth proportional to 1,420, 2,130.08 and 394.08 is: 591.14
Step by Step Solution
- Step 1: Write the proportion equation
1,420 : 2,130.08 = 394.08 : x - Step 2: Convert to fraction form
1,420/2,130.08 = 394.08/x - Step 3: Cross multiply
1,420x = 2,130.08 × 394.08 - Step 4: Simplify right side
1,420x = 839,421.93 - Step 5: Solve for x
x = 839,421.93/1,420 - Step 6: Final answer
x = 591.14
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.