Finding the Fourth Proportional to 643,135.18, 887,579.76 and 356,747.80
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Solution
The fourth proportional to 643,135.18, 887,579.76 and 356,747.80 is: 492,341.48
Step by Step Solution
- Step 1: Write the proportion equation
643,135.18 : 887,579.76 = 356,747.80 : x - Step 2: Convert to fraction form
643,135.18/887,579.76 = 356,747.80/x - Step 3: Cross multiply
643,135.18x = 887,579.76 × 356,747.80 - Step 4: Simplify right side
643,135.18x = 316,642,126,704.53 - Step 5: Solve for x
x = 316,642,126,704.53/643,135.18 - Step 6: Final answer
x = 492,341.48
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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.