Finding the Fourth Proportional to 638,129.70, 957,194.55 and 319,265.10
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Solution
The fourth proportional to 638,129.70, 957,194.55 and 319,265.10 is: 478,897.65
Step by Step Solution
- Step 1: Write the proportion equation
638,129.70 : 957,194.55 = 319,265.10 : x - Step 2: Convert to fraction form
638,129.70/957,194.55 = 319,265.10/x - Step 3: Cross multiply
638,129.70x = 957,194.55 × 319,265.10 - Step 4: Simplify right side
638,129.70x = 305,598,813,725.21 - Step 5: Solve for x
x = 305,598,813,725.21/638,129.70 - Step 6: Final answer
x = 478,897.65
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Half scale
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Double scale
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Similar ratio
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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.