Finding the Fourth Proportional to 642,905.10, 887,207.58 and 356,417.82
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Solution
The fourth proportional to 642,905.10, 887,207.58 and 356,417.82 is: 491,855.78
Step by Step Solution
- Step 1: Write the proportion equation
642,905.10 : 887,207.58 = 356,417.82 : x - Step 2: Convert to fraction form
642,905.10/887,207.58 = 356,417.82/x - Step 3: Cross multiply
642,905.10x = 887,207.58 × 356,417.82 - Step 4: Simplify right side
642,905.10x = 316,216,591,551.08 - Step 5: Solve for x
x = 316,216,591,551.08/642,905.10 - Step 6: Final answer
x = 491,855.78
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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.