Finding the Fourth Proportional to 311,352.12, 429,516.78 and 299,281.08
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Solution
The fourth proportional to 311,352.12, 429,516.78 and 299,281.08 is: 412,864.53
Step by Step Solution
- Step 1: Write the proportion equation
311,352.12 : 429,516.78 = 299,281.08 : x - Step 2: Convert to fraction form
311,352.12/429,516.78 = 299,281.08/x - Step 3: Cross multiply
311,352.12x = 429,516.78 × 299,281.08 - Step 4: Simplify right side
311,352.12x = 128,546,245,796.52 - Step 5: Solve for x
x = 128,546,245,796.52/311,352.12 - Step 6: Final answer
x = 412,864.53
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.