Finding the Fourth Proportional to 512,878.21, 768,629.63 and 399,163.33
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Solution
The fourth proportional to 512,878.21, 768,629.63 and 399,163.33 is: 598,209.77
Step by Step Solution
- Step 1: Write the proportion equation
512,878.21 : 768,629.63 = 399,163.33 : x - Step 2: Convert to fraction form
512,878.21/768,629.63 = 399,163.33/x - Step 3: Cross multiply
512,878.21x = 768,629.63 × 399,163.33 - Step 4: Simplify right side
512,878.21x = 306,808,759,159.98 - Step 5: Solve for x
x = 306,808,759,159.98/512,878.21 - Step 6: Final answer
x = 598,209.77
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.