Finding the Fourth Proportional to 643,136.18, 887,581.14 and 356,748.80
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Solution
The fourth proportional to 643,136.18, 887,581.14 and 356,748.80 is: 492,342.86
Step by Step Solution
- Step 1: Write the proportion equation
643,136.18 : 887,581.14 = 356,748.80 : x - Step 2: Convert to fraction form
643,136.18/887,581.14 = 356,748.80/x - Step 3: Cross multiply
643,136.18x = 887,581.14 × 356,748.80 - Step 4: Simplify right side
643,136.18x = 316,643,506,597.63 - Step 5: Solve for x
x = 316,643,506,597.63/643,136.18 - Step 6: Final answer
x = 492,342.86
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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.