Finding the Fourth Proportional to 311,990.11, 430,509.95 and 176,026.21
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Solution
The fourth proportional to 311,990.11, 430,509.95 and 176,026.21 is: 242,895.63
Step by Step Solution
- Step 1: Write the proportion equation
311,990.11 : 430,509.95 = 176,026.21 : x - Step 2: Convert to fraction form
311,990.11/430,509.95 = 176,026.21/x - Step 3: Cross multiply
311,990.11x = 430,509.95 × 176,026.21 - Step 4: Simplify right side
311,990.11x = 75,781,033,985.66 - Step 5: Solve for x
x = 75,781,033,985.66/311,990.11 - Step 6: Final answer
x = 242,895.63
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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.