Finding the Fourth Proportional to 688.36, 1,027.11 and 619.18
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Solution
The fourth proportional to 688.36, 1,027.11 and 619.18 is: 923.89
Step by Step Solution
- Step 1: Write the proportion equation
688.36 : 1,027.11 = 619.18 : x - Step 2: Convert to fraction form
688.36/1,027.11 = 619.18/x - Step 3: Cross multiply
688.36x = 1,027.11 × 619.18 - Step 4: Simplify right side
688.36x = 635,965.97 - Step 5: Solve for x
x = 635,965.97/688.36 - Step 6: Final answer
x = 923.89
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.