Finding the Fourth Proportional to 319,257.80, 478,886.70 and 257,049.80
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Solution
The fourth proportional to 319,257.80, 478,886.70 and 257,049.80 is: 385,574.70
Step by Step Solution
- Step 1: Write the proportion equation
319,257.80 : 478,886.70 = 257,049.80 : x - Step 2: Convert to fraction form
319,257.80/478,886.70 = 257,049.80/x - Step 3: Cross multiply
319,257.80x = 478,886.70 × 257,049.80 - Step 4: Simplify right side
319,257.80x = 123,097,730,457.66 - Step 5: Solve for x
x = 123,097,730,457.66/319,257.80 - Step 6: Final answer
x = 385,574.70
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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.