Finding the Fourth Proportional to 427,428.28, 640,928.58 and 143,021.08
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Solution
The fourth proportional to 427,428.28, 640,928.58 and 143,021.08 is: 214,460.07
Step by Step Solution
- Step 1: Write the proportion equation
427,428.28 : 640,928.58 = 143,021.08 : x - Step 2: Convert to fraction form
427,428.28/640,928.58 = 143,021.08/x - Step 3: Cross multiply
427,428.28x = 640,928.58 × 143,021.08 - Step 4: Simplify right side
427,428.28x = 91,666,297,714.47 - Step 5: Solve for x
x = 91,666,297,714.47/427,428.28 - Step 6: Final answer
x = 214,460.07
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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.