Finding the Fourth Proportional to 312,470.18, 431,209.95 and 169,229.78
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Solution
The fourth proportional to 312,470.18, 431,209.95 and 169,229.78 is: 233,537.69
Step by Step Solution
- Step 1: Write the proportion equation
312,470.18 : 431,209.95 = 169,229.78 : x - Step 2: Convert to fraction form
312,470.18/431,209.95 = 169,229.78/x - Step 3: Cross multiply
312,470.18x = 431,209.95 × 169,229.78 - Step 4: Simplify right side
312,470.18x = 72,973,564,972.31 - Step 5: Solve for x
x = 72,973,564,972.31/312,470.18 - Step 6: Final answer
x = 233,537.69
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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.