Finding the Fourth Proportional to 478,691,206.38, 717,982,976.57 and 128,963,121.71
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Solution
The fourth proportional to 478,691,206.38, 717,982,976.57 and 128,963,121.71 is: 193,430,179.53
Step by Step Solution
- Step 1: Write the proportion equation
478,691,206.38 : 717,982,976.57 = 128,963,121.71 : x - Step 2: Convert to fraction form
478,691,206.38/717,982,976.57 = 128,963,121.71/x - Step 3: Cross multiply
478,691,206.38x = 717,982,976.57 × 128,963,121.71 - Step 4: Simplify right side
478,691,206.38x = 92,593,325,988,870,256 - Step 5: Solve for x
x = 92,593,325,988,870,256/478,691,206.38 - Step 6: Final answer
x = 193,430,179.53
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.