Finding the Fourth Proportional to 878,878.90, 1,318,318.35 and 405,424.18
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Solution
The fourth proportional to 878,878.90, 1,318,318.35 and 405,424.18 is: 608,136.27
Step by Step Solution
- Step 1: Write the proportion equation
878,878.90 : 1,318,318.35 = 405,424.18 : x - Step 2: Convert to fraction form
878,878.90/1,318,318.35 = 405,424.18/x - Step 3: Cross multiply
878,878.90x = 1,318,318.35 × 405,424.18 - Step 4: Simplify right side
878,878.90x = 534,478,136,027.70 - Step 5: Solve for x
x = 534,478,136,027.70/878,878.90 - Step 6: Final answer
x = 608,136.27
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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.