Finding the Fourth Proportional to 784,880.10, 1,177,320.15 and 405,800.10
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Solution
The fourth proportional to 784,880.10, 1,177,320.15 and 405,800.10 is: 608,700.15
Step by Step Solution
- Step 1: Write the proportion equation
784,880.10 : 1,177,320.15 = 405,800.10 : x - Step 2: Convert to fraction form
784,880.10/1,177,320.15 = 405,800.10/x - Step 3: Cross multiply
784,880.10x = 1,177,320.15 × 405,800.10 - Step 4: Simplify right side
784,880.10x = 477,756,634,602.02 - Step 5: Solve for x
x = 477,756,634,602.02/784,880.10 - Step 6: Final answer
x = 608,700.15
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Double scale
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Similar ratio
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.