Finding the Fourth Proportional to 391,024.48, 539,577.84 and 221,231.20
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Solution
The fourth proportional to 391,024.48, 539,577.84 and 221,231.20 is: 305,278.72
Step by Step Solution
- Step 1: Write the proportion equation
391,024.48 : 539,577.84 = 221,231.20 : x - Step 2: Convert to fraction form
391,024.48/539,577.84 = 221,231.20/x - Step 3: Cross multiply
391,024.48x = 539,577.84 × 221,231.20 - Step 4: Simplify right side
391,024.48x = 119,371,453,036.61 - Step 5: Solve for x
x = 119,371,453,036.61/391,024.48 - Step 6: Final answer
x = 305,278.72
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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.