Finding the Fourth Proportional to 405.19, 606.75 and 347.79
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Solution
The fourth proportional to 405.19, 606.75 and 347.79 is: 520.80
Step by Step Solution
- Step 1: Write the proportion equation
405.19 : 606.75 = 347.79 : x - Step 2: Convert to fraction form
405.19/606.75 = 347.79/x - Step 3: Cross multiply
405.19x = 606.75 × 347.79 - Step 4: Simplify right side
405.19x = 211,021.58 - Step 5: Solve for x
x = 211,021.58/405.19 - Step 6: Final answer
x = 520.80
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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.