Finding the Fourth Proportional to 428,417.49, 641,428.16 and 322,905.81
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Solution
The fourth proportional to 428,417.49, 641,428.16 and 322,905.81 is: 483,455.70
Step by Step Solution
- Step 1: Write the proportion equation
428,417.49 : 641,428.16 = 322,905.81 : x - Step 2: Convert to fraction form
428,417.49/641,428.16 = 322,905.81/x - Step 3: Cross multiply
428,417.49x = 641,428.16 × 322,905.81 - Step 4: Simplify right side
428,417.49x = 207,120,877,947.08 - Step 5: Solve for x
x = 207,120,877,947.08/428,417.49 - Step 6: Final answer
x = 483,455.70
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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.