Finding the Fourth Proportional to 391,312.17, 586,971.36 and 138,593.70
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Solution
The fourth proportional to 391,312.17, 586,971.36 and 138,593.70 is: 207,891.65
Step by Step Solution
- Step 1: Write the proportion equation
391,312.17 : 586,971.36 = 138,593.70 : x - Step 2: Convert to fraction form
391,312.17/586,971.36 = 138,593.70/x - Step 3: Cross multiply
391,312.17x = 586,971.36 × 138,593.70 - Step 4: Simplify right side
391,312.17x = 81,350,532,576.43 - Step 5: Solve for x
x = 81,350,532,576.43/391,312.17 - Step 6: Final answer
x = 207,891.65
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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.