Finding the Fourth Proportional to 405,215.36, 559,198.92 and 221,457.68
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Solution
The fourth proportional to 405,215.36, 559,198.92 and 221,457.68 is: 305,612.54
Step by Step Solution
- Step 1: Write the proportion equation
405,215.36 : 559,198.92 = 221,457.68 : x - Step 2: Convert to fraction form
405,215.36/559,198.92 = 221,457.68/x - Step 3: Cross multiply
405,215.36x = 559,198.92 × 221,457.68 - Step 4: Simplify right side
405,215.36x = 123,838,895,613.17 - Step 5: Solve for x
x = 123,838,895,613.17/405,215.36 - Step 6: Final answer
x = 305,612.54
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1.5x scale
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.