Finding the Fourth Proportional to 878,902.20, 1,319,228.10 and 430,129.80
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Solution
The fourth proportional to 878,902.20, 1,319,228.10 and 430,129.80 is: 645,622.82
Step by Step Solution
- Step 1: Write the proportion equation
878,902.20 : 1,319,228.10 = 430,129.80 : x - Step 2: Convert to fraction form
878,902.20/1,319,228.10 = 430,129.80/x - Step 3: Cross multiply
878,902.20x = 1,319,228.10 × 430,129.80 - Step 4: Simplify right side
878,902.20x = 567,439,318,807.38 - Step 5: Solve for x
x = 567,439,318,807.38/878,902.20 - Step 6: Final answer
x = 645,622.82
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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.