Finding the Fourth Proportional to 639,873,864.81, 882,981,332.24 and 361,361,579.94
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Solution
The fourth proportional to 639,873,864.81, 882,981,332.24 and 361,361,579.94 is: 498,653,792.29
Step by Step Solution
- Step 1: Write the proportion equation
639,873,864.81 : 882,981,332.24 = 361,361,579.94 : x - Step 2: Convert to fraction form
639,873,864.81/882,981,332.24 = 361,361,579.94/x - Step 3: Cross multiply
639,873,864.81x = 882,981,332.24 × 361,361,579.94 - Step 4: Simplify right side
639,873,864.81x = 319,075,529,273,965,632 - Step 5: Solve for x
x = 319,075,529,273,965,632/639,873,864.81 - Step 6: Final answer
x = 498,653,792.29
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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.