Finding the Fourth Proportional to 898.11, 1,239.35 and 499.79
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Solution
The fourth proportional to 898.11, 1,239.35 and 499.79 is: 689.69
Step by Step Solution
- Step 1: Write the proportion equation
898.11 : 1,239.35 = 499.79 : x - Step 2: Convert to fraction form
898.11/1,239.35 = 499.79/x - Step 3: Cross multiply
898.11x = 1,239.35 × 499.79 - Step 4: Simplify right side
898.11x = 619,412.24 - Step 5: Solve for x
x = 619,412.24/898.11 - Step 6: Final answer
x = 689.69
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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.