Finding the Fourth Proportional to 643,201.60, 887,560.05 and 356,720.80
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Solution
The fourth proportional to 643,201.60, 887,560.05 and 356,720.80 is: 492,242.45
Step by Step Solution
- Step 1: Write the proportion equation
643,201.60 : 887,560.05 = 356,720.80 : x - Step 2: Convert to fraction form
643,201.60/887,560.05 = 356,720.80/x - Step 3: Cross multiply
643,201.60x = 887,560.05 × 356,720.80 - Step 4: Simplify right side
643,201.60x = 316,611,131,084.04 - Step 5: Solve for x
x = 316,611,131,084.04/643,201.60 - Step 6: Final answer
x = 492,242.45
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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.