Finding the Fourth Proportional to 287,643.05, 431,464.22 and 77,280.99
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Solution
The fourth proportional to 287,643.05, 431,464.22 and 77,280.99 is: 115,921.38
Step by Step Solution
- Step 1: Write the proportion equation
287,643.05 : 431,464.22 = 77,280.99 : x - Step 2: Convert to fraction form
287,643.05/431,464.22 = 77,280.99/x - Step 3: Cross multiply
287,643.05x = 431,464.22 × 77,280.99 - Step 4: Simplify right side
287,643.05x = 33,343,980,356.59 - Step 5: Solve for x
x = 33,343,980,356.59/287,643.05 - Step 6: Final answer
x = 115,921.38
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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.