Finding the Fourth Proportional to 399,724,339.53, 551,577,121.35 and 221,079,840.03
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Solution
The fourth proportional to 399,724,339.53, 551,577,121.35 and 221,079,840.03 is: 305,066,691.45
Step by Step Solution
- Step 1: Write the proportion equation
399,724,339.53 : 551,577,121.35 = 221,079,840.03 : x - Step 2: Convert to fraction form
399,724,339.53/551,577,121.35 = 221,079,840.03/x - Step 3: Cross multiply
399,724,339.53x = 551,577,121.35 × 221,079,840.03 - Step 4: Simplify right side
399,724,339.53x = 121,942,581,752,265,904 - Step 5: Solve for x
x = 121,942,581,752,265,904/399,724,339.53 - Step 6: Final answer
x = 305,066,691.45
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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.