Finding the Fourth Proportional to 280,277.20, 420,415.80 and 231,069.70
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Solution
The fourth proportional to 280,277.20, 420,415.80 and 231,069.70 is: 346,604.55
Step by Step Solution
- Step 1: Write the proportion equation
280,277.20 : 420,415.80 = 231,069.70 : x - Step 2: Convert to fraction form
280,277.20/420,415.80 = 231,069.70/x - Step 3: Cross multiply
280,277.20x = 420,415.80 × 231,069.70 - Step 4: Simplify right side
280,277.20x = 97,145,352,781.26 - Step 5: Solve for x
x = 97,145,352,781.26/280,277.20 - Step 6: Final answer
x = 346,604.55
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1.5x scale
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.