Finding the Fourth Proportional to 388,189.50, 535,911.78 and 272,258.99
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Solution
The fourth proportional to 388,189.50, 535,911.78 and 272,258.99 is: 375,864.89
Step by Step Solution
- Step 1: Write the proportion equation
388,189.50 : 535,911.78 = 272,258.99 : x - Step 2: Convert to fraction form
388,189.50/535,911.78 = 272,258.99/x - Step 3: Cross multiply
388,189.50x = 535,911.78 × 272,258.99 - Step 4: Simplify right side
388,189.50x = 145,906,799,951.90 - Step 5: Solve for x
x = 145,906,799,951.90/388,189.50 - Step 6: Final answer
x = 375,864.89
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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.