Finding the Fourth Proportional to 645,620.58, 890,963.19 and 355,235.94
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Solution
The fourth proportional to 645,620.58, 890,963.19 and 355,235.94 is: 490,229.33
Step by Step Solution
- Step 1: Write the proportion equation
645,620.58 : 890,963.19 = 355,235.94 : x - Step 2: Convert to fraction form
645,620.58/890,963.19 = 355,235.94/x - Step 3: Cross multiply
645,620.58x = 890,963.19 × 355,235.94 - Step 4: Simplify right side
645,620.58x = 316,502,146,305.05 - Step 5: Solve for x
x = 316,502,146,305.05/645,620.58 - Step 6: Final answer
x = 490,229.33
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.