Finding the Fourth Proportional to 645,115.10, 890,312.70 and 358,661.84
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Solution
The fourth proportional to 645,115.10, 890,312.70 and 358,661.84 is: 494,983.28
Step by Step Solution
- Step 1: Write the proportion equation
645,115.10 : 890,312.70 = 358,661.84 : x - Step 2: Convert to fraction form
645,115.10/890,312.70 = 358,661.84/x - Step 3: Cross multiply
645,115.10x = 890,312.70 × 358,661.84 - Step 4: Simplify right side
645,115.10x = 319,321,191,157.37 - Step 5: Solve for x
x = 319,321,191,157.37/645,115.10 - Step 6: Final answer
x = 494,983.28
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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.