Finding the Fourth Proportional to 420,639.21, 580,479.14 and 229,652.60
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Solution
The fourth proportional to 420,639.21, 580,479.14 and 229,652.60 is: 316,918.96
Step by Step Solution
- Step 1: Write the proportion equation
420,639.21 : 580,479.14 = 229,652.60 : x - Step 2: Convert to fraction form
420,639.21/580,479.14 = 229,652.60/x - Step 3: Cross multiply
420,639.21x = 580,479.14 × 229,652.60 - Step 4: Simplify right side
420,639.21x = 133,308,539,696.11 - Step 5: Solve for x
x = 133,308,539,696.11/420,639.21 - Step 6: Final answer
x = 316,918.96
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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.