Finding the Fourth Proportional to 260,090.40, 390,135.60 and 135,415.20
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Solution
The fourth proportional to 260,090.40, 390,135.60 and 135,415.20 is: 203,122.80
Step by Step Solution
- Step 1: Write the proportion equation
260,090.40 : 390,135.60 = 135,415.20 : x - Step 2: Convert to fraction form
260,090.40/390,135.60 = 135,415.20/x - Step 3: Cross multiply
260,090.40x = 390,135.60 × 135,415.20 - Step 4: Simplify right side
260,090.40x = 52,830,290,301.12 - Step 5: Solve for x
x = 52,830,290,301.12/260,090.40 - Step 6: Final answer
x = 203,122.80
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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.