Finding the Fourth Proportional to 339,943.80, 509,915.70 and 286,799.70
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Solution
The fourth proportional to 339,943.80, 509,915.70 and 286,799.70 is: 430,199.55
Step by Step Solution
- Step 1: Write the proportion equation
339,943.80 : 509,915.70 = 286,799.70 : x - Step 2: Convert to fraction form
339,943.80/509,915.70 = 286,799.70/x - Step 3: Cross multiply
339,943.80x = 509,915.70 × 286,799.70 - Step 4: Simplify right side
339,943.80x = 146,243,669,785.29 - Step 5: Solve for x
x = 146,243,669,785.29/339,943.80 - Step 6: Final answer
x = 430,199.55
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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.