Finding the Fourth Proportional to 686,299.84, 947,128.68 and 395,803.40
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Solution
The fourth proportional to 686,299.84, 947,128.68 and 395,803.40 is: 546,228.82
Step by Step Solution
- Step 1: Write the proportion equation
686,299.84 : 947,128.68 = 395,803.40 : x - Step 2: Convert to fraction form
686,299.84/947,128.68 = 395,803.40/x - Step 3: Cross multiply
686,299.84x = 947,128.68 × 395,803.40 - Step 4: Simplify right side
686,299.84x = 374,876,747,045.87 - Step 5: Solve for x
x = 374,876,747,045.87/686,299.84 - Step 6: Final answer
x = 546,228.82
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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.