Finding the Fourth Proportional to 291,428.19, 399,258.09 and 280,507.05
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Solution
The fourth proportional to 291,428.19, 399,258.09 and 280,507.05 is: 384,296.07
Step by Step Solution
- Step 1: Write the proportion equation
291,428.19 : 399,258.09 = 280,507.05 : x - Step 2: Convert to fraction form
291,428.19/399,258.09 = 280,507.05/x - Step 3: Cross multiply
291,428.19x = 399,258.09 × 280,507.05 - Step 4: Simplify right side
291,428.19x = 111,994,709,014.54 - Step 5: Solve for x
x = 111,994,709,014.54/291,428.19 - Step 6: Final answer
x = 384,296.07
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.