Finding the Fourth Proportional to 643,360.05, 887,943.35 and 356,972.40
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Solution
The fourth proportional to 643,360.05, 887,943.35 and 356,972.40 is: 492,680.99
Step by Step Solution
- Step 1: Write the proportion equation
643,360.05 : 887,943.35 = 356,972.40 : x - Step 2: Convert to fraction form
643,360.05/887,943.35 = 356,972.40/x - Step 3: Cross multiply
643,360.05x = 887,943.35 × 356,972.40 - Step 4: Simplify right side
643,360.05x = 316,971,266,928.68 - Step 5: Solve for x
x = 316,971,266,928.68/643,360.05 - Step 6: Final answer
x = 492,680.99
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1.5x scale
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.