Finding the Fourth Proportional to 839,918.20, 1,259,877.30 and 390,489.70
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Solution
The fourth proportional to 839,918.20, 1,259,877.30 and 390,489.70 is: 585,734.55
Step by Step Solution
- Step 1: Write the proportion equation
839,918.20 : 1,259,877.30 = 390,489.70 : x - Step 2: Convert to fraction form
839,918.20/1,259,877.30 = 390,489.70/x - Step 3: Cross multiply
839,918.20x = 1,259,877.30 × 390,489.70 - Step 4: Simplify right side
839,918.20x = 491,969,108,913.81 - Step 5: Solve for x
x = 491,969,108,913.81/839,918.20 - Step 6: Final answer
x = 585,734.55
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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.