Finding the Fourth Proportional to 430,983.48, 646,474.80 and 115,431.78
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Solution
The fourth proportional to 430,983.48, 646,474.80 and 115,431.78 is: 173,147.56
Step by Step Solution
- Step 1: Write the proportion equation
430,983.48 : 646,474.80 = 115,431.78 : x - Step 2: Convert to fraction form
430,983.48/646,474.80 = 115,431.78/x - Step 3: Cross multiply
430,983.48x = 646,474.80 × 115,431.78 - Step 4: Simplify right side
430,983.48x = 74,623,736,889.14 - Step 5: Solve for x
x = 74,623,736,889.14/430,983.48 - Step 6: Final answer
x = 173,147.56
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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.