Finding the Fourth Proportional to 716,276.30, 988,440.68 and 393,986.40
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Solution
The fourth proportional to 716,276.30, 988,440.68 and 393,986.40 is: 543,689.89
Step by Step Solution
- Step 1: Write the proportion equation
716,276.30 : 988,440.68 = 393,986.40 : x - Step 2: Convert to fraction form
716,276.30/988,440.68 = 393,986.40/x - Step 3: Cross multiply
716,276.30x = 988,440.68 × 393,986.40 - Step 4: Simplify right side
716,276.30x = 389,432,185,126.75 - Step 5: Solve for x
x = 389,432,185,126.75/716,276.30 - Step 6: Final answer
x = 543,689.89
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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.