Finding the Fourth Proportional to 478,515.40, 717,365.40 and 212,130.70
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Solution
The fourth proportional to 478,515.40, 717,365.40 and 212,130.70 is: 318,015.31
Step by Step Solution
- Step 1: Write the proportion equation
478,515.40 : 717,365.40 = 212,130.70 : x - Step 2: Convert to fraction form
478,515.40/717,365.40 = 212,130.70/x - Step 3: Cross multiply
478,515.40x = 717,365.40 × 212,130.70 - Step 4: Simplify right side
478,515.40x = 152,175,224,457.78 - Step 5: Solve for x
x = 152,175,224,457.78/478,515.40 - Step 6: Final answer
x = 318,015.31
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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.