Finding the Fourth Proportional to 391,058.63, 539,660.90 and 212,210.63
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Solution
The fourth proportional to 391,058.63, 539,660.90 and 212,210.63 is: 292,850.66
Step by Step Solution
- Step 1: Write the proportion equation
391,058.63 : 539,660.90 = 212,210.63 : x - Step 2: Convert to fraction form
391,058.63/539,660.90 = 212,210.63/x - Step 3: Cross multiply
391,058.63x = 539,660.90 × 212,210.63 - Step 4: Simplify right side
391,058.63x = 114,521,777,407.59 - Step 5: Solve for x
x = 114,521,777,407.59/391,058.63 - Step 6: Final answer
x = 292,850.66
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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.