Finding the Fourth Proportional to 521,975.81, 720,314.37 and 307,129.79
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Solution
The fourth proportional to 521,975.81, 720,314.37 and 307,129.79 is: 423,831.90
Step by Step Solution
- Step 1: Write the proportion equation
521,975.81 : 720,314.37 = 307,129.79 : x - Step 2: Convert to fraction form
521,975.81/720,314.37 = 307,129.79/x - Step 3: Cross multiply
521,975.81x = 720,314.37 × 307,129.79 - Step 4: Simplify right side
521,975.81x = 221,230,001,192.08 - Step 5: Solve for x
x = 221,230,001,192.08/521,975.81 - Step 6: Final answer
x = 423,831.90
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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.