Finding the Fourth Proportional to 431,315.20, 646,972.80 and 369,107.20
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Solution
The fourth proportional to 431,315.20, 646,972.80 and 369,107.20 is: 553,660.80
Step by Step Solution
- Step 1: Write the proportion equation
431,315.20 : 646,972.80 = 369,107.20 : x - Step 2: Convert to fraction form
431,315.20/646,972.80 = 369,107.20/x - Step 3: Cross multiply
431,315.20x = 646,972.80 × 369,107.20 - Step 4: Simplify right side
431,315.20x = 238,802,318,684.16 - Step 5: Solve for x
x = 238,802,318,684.16/431,315.20 - Step 6: Final answer
x = 553,660.80
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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.