Finding the Fourth Proportional to 390,841.88, 539,361.79 and 211,993.88
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Solution
The fourth proportional to 390,841.88, 539,361.79 and 211,993.88 is: 292,551.55
Step by Step Solution
- Step 1: Write the proportion equation
390,841.88 : 539,361.79 = 211,993.88 : x - Step 2: Convert to fraction form
390,841.88/539,361.79 = 211,993.88/x - Step 3: Cross multiply
390,841.88x = 539,361.79 × 211,993.88 - Step 4: Simplify right side
390,841.88x = 114,341,395,359.05 - Step 5: Solve for x
x = 114,341,395,359.05/390,841.88 - Step 6: Final answer
x = 292,551.55
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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.