Finding the Fourth Proportional to 391,955.27, 540,318.35 and 305,816.63
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Solution
The fourth proportional to 391,955.27, 540,318.35 and 305,816.63 is: 421,574.47
Step by Step Solution
- Step 1: Write the proportion equation
391,955.27 : 540,318.35 = 305,816.63 : x - Step 2: Convert to fraction form
391,955.27/540,318.35 = 305,816.63/x - Step 3: Cross multiply
391,955.27x = 540,318.35 × 305,816.63 - Step 4: Simplify right side
391,955.27x = 165,238,335,395.08 - Step 5: Solve for x
x = 165,238,335,395.08/391,955.27 - Step 6: Final answer
x = 421,574.47
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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.