Finding the Fourth Proportional to 639,658.80, 882,742.91 and 353,196.99
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Solution
The fourth proportional to 639,658.80, 882,742.91 and 353,196.99 is: 487,419.44
Step by Step Solution
- Step 1: Write the proportion equation
639,658.80 : 882,742.91 = 353,196.99 : x - Step 2: Convert to fraction form
639,658.80/882,742.91 = 353,196.99/x - Step 3: Cross multiply
639,658.80x = 882,742.91 × 353,196.99 - Step 4: Simplify right side
639,658.80x = 311,782,136,989.86 - Step 5: Solve for x
x = 311,782,136,989.86/639,658.80 - Step 6: Final answer
x = 487,419.44
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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.