Finding the Fourth Proportional to 520,090.05, 780,135.08 and 220,519.65
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Solution
The fourth proportional to 520,090.05, 780,135.08 and 220,519.65 is: 330,779.48
Step by Step Solution
- Step 1: Write the proportion equation
520,090.05 : 780,135.08 = 220,519.65 : x - Step 2: Convert to fraction form
520,090.05/780,135.08 = 220,519.65/x - Step 3: Cross multiply
520,090.05x = 780,135.08 × 220,519.65 - Step 4: Simplify right side
520,090.05x = 172,035,113,691.72 - Step 5: Solve for x
x = 172,035,113,691.72/520,090.05 - Step 6: Final answer
x = 330,779.48
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Double scale
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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.