Finding the Fourth Proportional to 428,793.19, 642,332.14 and 257,920.55
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Solution
The fourth proportional to 428,793.19, 642,332.14 and 257,920.55 is: 386,364.94
Step by Step Solution
- Step 1: Write the proportion equation
428,793.19 : 642,332.14 = 257,920.55 : x - Step 2: Convert to fraction form
428,793.19/642,332.14 = 257,920.55/x - Step 3: Cross multiply
428,793.19x = 642,332.14 × 257,920.55 - Step 4: Simplify right side
428,793.19x = 165,670,654,975.02 - Step 5: Solve for x
x = 165,670,654,975.02/428,793.19 - Step 6: Final answer
x = 386,364.94
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.