Finding the Fourth Proportional to 389,128.49, 536,793.06 and 316,612.45
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Solution
The fourth proportional to 389,128.49, 536,793.06 and 316,612.45 is: 436,758.99
Step by Step Solution
- Step 1: Write the proportion equation
389,128.49 : 536,793.06 = 316,612.45 : x - Step 2: Convert to fraction form
389,128.49/536,793.06 = 316,612.45/x - Step 3: Cross multiply
389,128.49x = 536,793.06 × 316,612.45 - Step 4: Simplify right side
389,128.49x = 169,955,365,869.60 - Step 5: Solve for x
x = 169,955,365,869.60/389,128.49 - Step 6: Final answer
x = 436,758.99
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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.