Finding the Fourth Proportional to 292,437.20, 438,655.80 and 70,821.20
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Solution
The fourth proportional to 292,437.20, 438,655.80 and 70,821.20 is: 106,231.80
Step by Step Solution
- Step 1: Write the proportion equation
292,437.20 : 438,655.80 = 70,821.20 : x - Step 2: Convert to fraction form
292,437.20/438,655.80 = 70,821.20/x - Step 3: Cross multiply
292,437.20x = 438,655.80 × 70,821.20 - Step 4: Simplify right side
292,437.20x = 31,066,130,142.96 - Step 5: Solve for x
x = 31,066,130,142.96/292,437.20 - Step 6: Final answer
x = 106,231.80
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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.