Finding the Fourth Proportional to 808,815.40, 1,214,000.70 and 409,906.60
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Solution
The fourth proportional to 808,815.40, 1,214,000.70 and 409,906.60 is: 615,253.99
Step by Step Solution
- Step 1: Write the proportion equation
808,815.40 : 1,214,000.70 = 409,906.60 : x - Step 2: Convert to fraction form
808,815.40/1,214,000.70 = 409,906.60/x - Step 3: Cross multiply
808,815.40x = 1,214,000.70 × 409,906.60 - Step 4: Simplify right side
808,815.40x = 497,626,899,334.62 - Step 5: Solve for x
x = 497,626,899,334.62/808,815.40 - Step 6: Final answer
x = 615,253.99
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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.