Finding the Fourth Proportional to 391,066.68, 586,686.42 and 141,742.20
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Solution
The fourth proportional to 391,066.68, 586,686.42 and 141,742.20 is: 212,644.62
Step by Step Solution
- Step 1: Write the proportion equation
391,066.68 : 586,686.42 = 141,742.20 : x - Step 2: Convert to fraction form
391,066.68/586,686.42 = 141,742.20/x - Step 3: Cross multiply
391,066.68x = 586,686.42 × 141,742.20 - Step 4: Simplify right side
391,066.68x = 83,158,223,880.92 - Step 5: Solve for x
x = 83,158,223,880.92/391,066.68 - Step 6: Final answer
x = 212,644.62
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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.