Finding the Fourth Proportional to 307,985.40, 430,129.80 and 307,985.40
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Solution
The fourth proportional to 307,985.40, 430,129.80 and 307,985.40 is: 430,129.80
Step by Step Solution
- Step 1: Write the proportion equation
307,985.40 : 430,129.80 = 307,985.40 : x - Step 2: Convert to fraction form
307,985.40/430,129.80 = 307,985.40/x - Step 3: Cross multiply
307,985.40x = 430,129.80 × 307,985.40 - Step 4: Simplify right side
307,985.40x = 132,473,698,504.92 - Step 5: Solve for x
x = 132,473,698,504.92/307,985.40 - Step 6: Final answer
x = 430,129.80
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Why These Related Problems?
These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.