Finding the Fourth Proportional to 391,069.62, 539,676.08 and 212,221.62
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Solution
The fourth proportional to 391,069.62, 539,676.08 and 212,221.62 is: 292,865.84
Step by Step Solution
- Step 1: Write the proportion equation
391,069.62 : 539,676.08 = 212,221.62 : x - Step 2: Convert to fraction form
391,069.62/539,676.08 = 212,221.62/x - Step 3: Cross multiply
391,069.62x = 539,676.08 × 212,221.62 - Step 4: Simplify right side
391,069.62x = 114,530,931,972.85 - Step 5: Solve for x
x = 114,530,931,972.85/391,069.62 - Step 6: Final answer
x = 292,865.84
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1.5x scale
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.