Finding the Fourth Proportional to 312,438.74, 430,926.24 and 215,804.31
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Solution
The fourth proportional to 312,438.74, 430,926.24 and 215,804.31 is: 297,644.72
Step by Step Solution
- Step 1: Write the proportion equation
312,438.74 : 430,926.24 = 215,804.31 : x - Step 2: Convert to fraction form
312,438.74/430,926.24 = 215,804.31/x - Step 3: Cross multiply
312,438.74x = 430,926.24 × 215,804.31 - Step 4: Simplify right side
312,438.74x = 92,995,740,289.37 - Step 5: Solve for x
x = 92,995,740,289.37/312,438.74 - Step 6: Final answer
x = 297,644.72
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1.5x scale
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.