Finding the Fourth Proportional to 319,988.80, 479,983.20 and 315,323.20
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Solution
The fourth proportional to 319,988.80, 479,983.20 and 315,323.20 is: 472,984.80
Step by Step Solution
- Step 1: Write the proportion equation
319,988.80 : 479,983.20 = 315,323.20 : x - Step 2: Convert to fraction form
319,988.80/479,983.20 = 315,323.20/x - Step 3: Cross multiply
319,988.80x = 479,983.20 × 315,323.20 - Step 4: Simplify right side
319,988.80x = 151,349,838,570.24 - Step 5: Solve for x
x = 151,349,838,570.24/319,988.80 - Step 6: Final answer
x = 472,984.80
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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.