Finding the Fourth Proportional to 664,980.36, 917,678.74 and 378,518.88
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Solution
The fourth proportional to 664,980.36, 917,678.74 and 378,518.88 is: 522,359.38
Step by Step Solution
- Step 1: Write the proportion equation
664,980.36 : 917,678.74 = 378,518.88 : x - Step 2: Convert to fraction form
664,980.36/917,678.74 = 378,518.88/x - Step 3: Cross multiply
664,980.36x = 917,678.74 × 378,518.88 - Step 4: Simplify right side
664,980.36x = 347,358,728,864.61 - Step 5: Solve for x
x = 347,358,728,864.61/664,980.36 - Step 6: Final answer
x = 522,359.38
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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.