Finding the Fourth Proportional to 385,420.80, 577,785.60 and 343,430.40
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Solution
The fourth proportional to 385,420.80, 577,785.60 and 343,430.40 is: 514,837.65
Step by Step Solution
- Step 1: Write the proportion equation
385,420.80 : 577,785.60 = 343,430.40 : x - Step 2: Convert to fraction form
385,420.80/577,785.60 = 343,430.40/x - Step 3: Cross multiply
385,420.80x = 577,785.60 × 343,430.40 - Step 4: Simplify right side
385,420.80x = 198,429,139,722.24 - Step 5: Solve for x
x = 198,429,139,722.24/385,420.80 - Step 6: Final answer
x = 514,837.65
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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.