Finding the Fourth Proportional to 512,598.70, 768,898.05 and 212,979.70
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Solution
The fourth proportional to 512,598.70, 768,898.05 and 212,979.70 is: 319,469.55
Step by Step Solution
- Step 1: Write the proportion equation
512,598.70 : 768,898.05 = 212,979.70 : x - Step 2: Convert to fraction form
512,598.70/768,898.05 = 212,979.70/x - Step 3: Cross multiply
512,598.70x = 768,898.05 × 212,979.70 - Step 4: Simplify right side
512,598.70x = 163,759,676,019.59 - Step 5: Solve for x
x = 163,759,676,019.59/512,598.70 - Step 6: Final answer
x = 319,469.55
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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.