Finding the Fourth Proportional to 1,008,138.79, 1,391,230.69 and 555,429.79
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Solution
The fourth proportional to 1,008,138.79, 1,391,230.69 and 555,429.79 is: 766,492.65
Step by Step Solution
- Step 1: Write the proportion equation
1,008,138.79 : 1,391,230.69 = 555,429.79 : x - Step 2: Convert to fraction form
1,008,138.79/1,391,230.69 = 555,429.79/x - Step 3: Cross multiply
1,008,138.79x = 1,391,230.69 × 555,429.79 - Step 4: Simplify right side
1,008,138.79x = 772,730,969,988.26 - Step 5: Solve for x
x = 772,730,969,988.26/1,008,138.79 - Step 6: Final answer
x = 766,492.65
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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.