Finding the Fourth Proportional to 521,976.81, 720,315.75 and 307,130.79
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Solution
The fourth proportional to 521,976.81, 720,315.75 and 307,130.79 is: 423,833.28
Step by Step Solution
- Step 1: Write the proportion equation
521,976.81 : 720,315.75 = 307,130.79 : x - Step 2: Convert to fraction form
521,976.81/720,315.75 = 307,130.79/x - Step 3: Cross multiply
521,976.81x = 720,315.75 × 307,130.79 - Step 4: Simplify right side
521,976.81x = 221,231,145,346.94 - Step 5: Solve for x
x = 221,231,145,346.94/521,976.81 - Step 6: Final answer
x = 423,833.28
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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.