Finding the Fourth Proportional to 391,513.68, 540,274.44 and 212,661.84
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Solution
The fourth proportional to 391,513.68, 540,274.44 and 212,661.84 is: 293,465.50
Step by Step Solution
- Step 1: Write the proportion equation
391,513.68 : 540,274.44 = 212,661.84 : x - Step 2: Convert to fraction form
391,513.68/540,274.44 = 212,661.84/x - Step 3: Cross multiply
391,513.68x = 540,274.44 × 212,661.84 - Step 4: Simplify right side
391,513.68x = 114,895,756,515.37 - Step 5: Solve for x
x = 114,895,756,515.37/391,513.68 - Step 6: Final answer
x = 293,465.50
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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.