Finding the Fourth Proportional to 459,713.80, 689,570.70 and 319,745.80
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Solution
The fourth proportional to 459,713.80, 689,570.70 and 319,745.80 is: 479,618.70
Step by Step Solution
- Step 1: Write the proportion equation
459,713.80 : 689,570.70 = 319,745.80 : x - Step 2: Convert to fraction form
459,713.80/689,570.70 = 319,745.80/x - Step 3: Cross multiply
459,713.80x = 689,570.70 × 319,745.80 - Step 4: Simplify right side
459,713.80x = 220,487,335,128.06 - Step 5: Solve for x
x = 220,487,335,128.06/459,713.80 - Step 6: Final answer
x = 479,618.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.