Finding the Fourth Proportional to 391,478.91, 540,231.99 and 228,125.20
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Solution
The fourth proportional to 391,478.91, 540,231.99 and 228,125.20 is: 314,807.59
Step by Step Solution
- Step 1: Write the proportion equation
391,478.91 : 540,231.99 = 228,125.20 : x - Step 2: Convert to fraction form
391,478.91/540,231.99 = 228,125.20/x - Step 3: Cross multiply
391,478.91x = 540,231.99 × 228,125.20 - Step 4: Simplify right side
391,478.91x = 123,240,530,765.15 - Step 5: Solve for x
x = 123,240,530,765.15/391,478.91 - Step 6: Final answer
x = 314,807.59
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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.