Finding the Fourth Proportional to 283,108.75, 390,692.85 and 155,787.09
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Solution
The fourth proportional to 283,108.75, 390,692.85 and 155,787.09 is: 214,987.71
Step by Step Solution
- Step 1: Write the proportion equation
283,108.75 : 390,692.85 = 155,787.09 : x - Step 2: Convert to fraction form
283,108.75/390,692.85 = 155,787.09/x - Step 3: Cross multiply
283,108.75x = 390,692.85 × 155,787.09 - Step 4: Simplify right side
283,108.75x = 60,864,902,185.31 - Step 5: Solve for x
x = 60,864,902,185.31/283,108.75 - Step 6: Final answer
x = 214,987.71
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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.