Finding the Fourth Proportional to 432.93, 643.84 and 419.26
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Solution
The fourth proportional to 432.93, 643.84 and 419.26 is: 623.51
Step by Step Solution
- Step 1: Write the proportion equation
432.93 : 643.84 = 419.26 : x - Step 2: Convert to fraction form
432.93/643.84 = 419.26/x - Step 3: Cross multiply
432.93x = 643.84 × 419.26 - Step 4: Simplify right side
432.93x = 269,934.26 - Step 5: Solve for x
x = 269,934.26/432.93 - Step 6: Final answer
x = 623.51
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.