Finding the Fourth Proportional to 512,590.13, 768,885.20 and 138,613.13
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Solution
The fourth proportional to 512,590.13, 768,885.20 and 138,613.13 is: 207,919.69
Step by Step Solution
- Step 1: Write the proportion equation
512,590.13 : 768,885.20 = 138,613.13 : x - Step 2: Convert to fraction form
512,590.13/768,885.20 = 138,613.13/x - Step 3: Cross multiply
512,590.13x = 768,885.20 × 138,613.13 - Step 4: Simplify right side
512,590.13x = 106,577,579,645.18 - Step 5: Solve for x
x = 106,577,579,645.18/512,590.13 - Step 6: Final answer
x = 207,919.69
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Similar ratio
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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.