Finding the Fourth Proportional to 319,908.32, 438,272.36 and 307,946.08
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Solution
The fourth proportional to 319,908.32, 438,272.36 and 307,946.08 is: 421,884.17
Step by Step Solution
- Step 1: Write the proportion equation
319,908.32 : 438,272.36 = 307,946.08 : x - Step 2: Convert to fraction form
319,908.32/438,272.36 = 307,946.08/x - Step 3: Cross multiply
319,908.32x = 438,272.36 × 307,946.08 - Step 4: Simplify right side
319,908.32x = 134,964,255,234.35 - Step 5: Solve for x
x = 134,964,255,234.35/319,908.32 - Step 6: Final answer
x = 421,884.17
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.