Finding the Fourth Proportional to 521,974.81, 720,312.99 and 307,128.79
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Solution
The fourth proportional to 521,974.81, 720,312.99 and 307,128.79 is: 423,830.52
Step by Step Solution
- Step 1: Write the proportion equation
521,974.81 : 720,312.99 = 307,128.79 : x - Step 2: Convert to fraction form
521,974.81/720,312.99 = 307,128.79/x - Step 3: Cross multiply
521,974.81x = 720,312.99 × 307,128.79 - Step 4: Simplify right side
521,974.81x = 221,228,857,039.98 - Step 5: Solve for x
x = 221,228,857,039.98/521,974.81 - Step 6: Final answer
x = 423,830.52
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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.