Finding the Fourth Proportional to 665,466.36, 918,237.42 and 378,991.80
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Solution
The fourth proportional to 665,466.36, 918,237.42 and 378,991.80 is: 522,948.23
Step by Step Solution
- Step 1: Write the proportion equation
665,466.36 : 918,237.42 = 378,991.80 : x - Step 2: Convert to fraction form
665,466.36/918,237.42 = 378,991.80/x - Step 3: Cross multiply
665,466.36x = 918,237.42 × 378,991.80 - Step 4: Simplify right side
665,466.36x = 348,004,452,633.16 - Step 5: Solve for x
x = 348,004,452,633.16/665,466.36 - Step 6: Final answer
x = 522,948.23
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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.