Finding the Fourth Proportional to 399,901.20, 551,864.74 and 218,615.28
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Solution
The fourth proportional to 399,901.20, 551,864.74 and 218,615.28 is: 301,689.68
Step by Step Solution
- Step 1: Write the proportion equation
399,901.20 : 551,864.74 = 218,615.28 : x - Step 2: Convert to fraction form
399,901.20/551,864.74 = 218,615.28/x - Step 3: Cross multiply
399,901.20x = 551,864.74 × 218,615.28 - Step 4: Simplify right side
399,901.20x = 120,646,064,657.23 - Step 5: Solve for x
x = 120,646,064,657.23/399,901.20 - Step 6: Final answer
x = 301,689.68
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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.