Finding the Fourth Proportional to 391,076.88, 539,686.09 and 212,228.88
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Solution
The fourth proportional to 391,076.88, 539,686.09 and 212,228.88 is: 292,875.85
Step by Step Solution
- Step 1: Write the proportion equation
391,076.88 : 539,686.09 = 212,228.88 : x - Step 2: Convert to fraction form
391,076.88/539,686.09 = 212,228.88/x - Step 3: Cross multiply
391,076.88x = 539,686.09 × 212,228.88 - Step 4: Simplify right side
391,076.88x = 114,536,971,733.85 - Step 5: Solve for x
x = 114,536,971,733.85/391,076.88 - Step 6: Final answer
x = 292,875.85
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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.