Finding the Fourth Proportional to 391,122.21, 539,748.86 and 212,274.21
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Solution
The fourth proportional to 391,122.21, 539,748.86 and 212,274.21 is: 292,938.52
Step by Step Solution
- Step 1: Write the proportion equation
391,122.21 : 539,748.86 = 212,274.21 : x - Step 2: Convert to fraction form
391,122.21/539,748.86 = 212,274.21/x - Step 3: Cross multiply
391,122.21x = 539,748.86 × 212,274.21 - Step 4: Simplify right side
391,122.21x = 114,574,762,854.90 - Step 5: Solve for x
x = 114,574,762,854.90/391,122.21 - Step 6: Final answer
x = 292,938.52
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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.