Finding the Fourth Proportional to 403,420.40, 605,130.60 and 385,705.70
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Solution
The fourth proportional to 403,420.40, 605,130.60 and 385,705.70 is: 578,558.55
Step by Step Solution
- Step 1: Write the proportion equation
403,420.40 : 605,130.60 = 385,705.70 : x - Step 2: Convert to fraction form
403,420.40/605,130.60 = 385,705.70/x - Step 3: Cross multiply
403,420.40x = 605,130.60 × 385,705.70 - Step 4: Simplify right side
403,420.40x = 233,402,321,664.42 - Step 5: Solve for x
x = 233,402,321,664.42/403,420.40 - Step 6: Final answer
x = 578,558.55
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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.