Finding the Fourth Proportional to 399,278.23, 551,011.75 and 217,990.62
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Solution
The fourth proportional to 399,278.23, 551,011.75 and 217,990.62 is: 300,831.31
Step by Step Solution
- Step 1: Write the proportion equation
399,278.23 : 551,011.75 = 217,990.62 : x - Step 2: Convert to fraction form
399,278.23/551,011.75 = 217,990.62/x - Step 3: Cross multiply
399,278.23x = 551,011.75 × 217,990.62 - Step 4: Simplify right side
399,278.23x = 120,115,395,348.57 - Step 5: Solve for x
x = 120,115,395,348.57/399,278.23 - Step 6: Final answer
x = 300,831.31
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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.