Finding the Fourth Proportional to 319,239.80, 478,859.70 and 257,031.80
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Solution
The fourth proportional to 319,239.80, 478,859.70 and 257,031.80 is: 385,547.70
Step by Step Solution
- Step 1: Write the proportion equation
319,239.80 : 478,859.70 = 257,031.80 : x - Step 2: Convert to fraction form
319,239.80/478,859.70 = 257,031.80/x - Step 3: Cross multiply
319,239.80x = 478,859.70 × 257,031.80 - Step 4: Simplify right side
319,239.80x = 123,082,170,638.46 - Step 5: Solve for x
x = 123,082,170,638.46/319,239.80 - Step 6: Final answer
x = 385,547.70
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1.5x scale
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.