Finding the Fourth Proportional to 287,193.85, 431,056.74 and 145,139.09
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Solution
The fourth proportional to 287,193.85, 431,056.74 and 145,139.09 is: 217,843.04
Step by Step Solution
- Step 1: Write the proportion equation
287,193.85 : 431,056.74 = 145,139.09 : x - Step 2: Convert to fraction form
287,193.85/431,056.74 = 145,139.09/x - Step 3: Cross multiply
287,193.85x = 431,056.74 × 145,139.09 - Step 4: Simplify right side
287,193.85x = 62,563,182,979.24 - Step 5: Solve for x
x = 62,563,182,979.24/287,193.85 - Step 6: Final answer
x = 217,843.04
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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.