Finding the Fourth Proportional to 405,655.80, 607,317.30 and 393,991.80
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Solution
The fourth proportional to 405,655.80, 607,317.30 and 393,991.80 is: 589,854.84
Step by Step Solution
- Step 1: Write the proportion equation
405,655.80 : 607,317.30 = 393,991.80 : x - Step 2: Convert to fraction form
405,655.80/607,317.30 = 393,991.80/x - Step 3: Cross multiply
405,655.80x = 607,317.30 × 393,991.80 - Step 4: Simplify right side
405,655.80x = 239,278,036,198.14 - Step 5: Solve for x
x = 239,278,036,198.14/405,655.80 - Step 6: Final answer
x = 589,854.84
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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.