Finding the Fourth Proportional to 287,720.20, 431,579.58 and 77,358.12
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Solution
The fourth proportional to 287,720.20, 431,579.58 and 77,358.12 is: 116,036.99
Step by Step Solution
- Step 1: Write the proportion equation
287,720.20 : 431,579.58 = 77,358.12 : x - Step 2: Convert to fraction form
287,720.20/431,579.58 = 77,358.12/x - Step 3: Cross multiply
287,720.20x = 431,579.58 × 77,358.12 - Step 4: Simplify right side
287,720.20x = 33,386,184,939.19 - Step 5: Solve for x
x = 33,386,184,939.19/287,720.20 - Step 6: Final answer
x = 116,036.99
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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.