Finding the Fourth Proportional to 1,188,381.68, 1,782,208.20 and 430,132.40
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Solution
The fourth proportional to 1,188,381.68, 1,782,208.20 and 430,132.40 is: 645,066.74
Step by Step Solution
- Step 1: Write the proportion equation
1,188,381.68 : 1,782,208.20 = 430,132.40 : x - Step 2: Convert to fraction form
1,188,381.68/1,782,208.20 = 430,132.40/x - Step 3: Cross multiply
1,188,381.68x = 1,782,208.20 × 430,132.40 - Step 4: Simplify right side
1,188,381.68x = 766,585,490,365.68 - Step 5: Solve for x
x = 766,585,490,365.68/1,188,381.68 - Step 6: Final answer
x = 645,066.74
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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.