Finding the Fourth Proportional to 307,813.20, 461,719.80 and 86,197.20
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Solution
The fourth proportional to 307,813.20, 461,719.80 and 86,197.20 is: 129,295.80
Step by Step Solution
- Step 1: Write the proportion equation
307,813.20 : 461,719.80 = 86,197.20 : x - Step 2: Convert to fraction form
307,813.20/461,719.80 = 86,197.20/x - Step 3: Cross multiply
307,813.20x = 461,719.80 × 86,197.20 - Step 4: Simplify right side
307,813.20x = 39,798,953,944.56 - Step 5: Solve for x
x = 39,798,953,944.56/307,813.20 - Step 6: Final answer
x = 129,295.80
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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.