Finding the Fourth Proportional to 279,990.40, 386,387.13 and 152,665.99
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Solution
The fourth proportional to 279,990.40, 386,387.13 and 152,665.99 is: 210,679.27
Step by Step Solution
- Step 1: Write the proportion equation
279,990.40 : 386,387.13 = 152,665.99 : x - Step 2: Convert to fraction form
279,990.40/386,387.13 = 152,665.99/x - Step 3: Cross multiply
279,990.40x = 386,387.13 × 152,665.99 - Step 4: Simplify right side
279,990.40x = 58,988,171,792.77 - Step 5: Solve for x
x = 58,988,171,792.77/279,990.40 - Step 6: Final answer
x = 210,679.27
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1.5x scale
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.