Finding the Fourth Proportional to 391,285.21, 539,947.65 and 216,843.70
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Solution
The fourth proportional to 391,285.21, 539,947.65 and 216,843.70 is: 299,229.93
Step by Step Solution
- Step 1: Write the proportion equation
391,285.21 : 539,947.65 = 216,843.70 : x - Step 2: Convert to fraction form
391,285.21/539,947.65 = 216,843.70/x - Step 3: Cross multiply
391,285.21x = 539,947.65 × 216,843.70 - Step 4: Simplify right side
391,285.21x = 117,084,246,232.31 - Step 5: Solve for x
x = 117,084,246,232.31/391,285.21 - Step 6: Final answer
x = 299,229.93
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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.