Finding the Fourth Proportional to 386,486.74, 533,356.95 and 289,518.81
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Solution
The fourth proportional to 386,486.74, 533,356.95 and 289,518.81 is: 399,539.89
Step by Step Solution
- Step 1: Write the proportion equation
386,486.74 : 533,356.95 = 289,518.81 : x - Step 2: Convert to fraction form
386,486.74/533,356.95 = 289,518.81/x - Step 3: Cross multiply
386,486.74x = 533,356.95 × 289,518.81 - Step 4: Simplify right side
386,486.74x = 154,416,869,469.23 - Step 5: Solve for x
x = 154,416,869,469.23/386,486.74 - Step 6: Final answer
x = 399,539.89
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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.