Finding the Fourth Proportional to 686,775.24, 947,809.76 and 400,289.18
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Solution
The fourth proportional to 686,775.24, 947,809.76 and 400,289.18 is: 552,433.99
Step by Step Solution
- Step 1: Write the proportion equation
686,775.24 : 947,809.76 = 400,289.18 : x - Step 2: Convert to fraction form
686,775.24/947,809.76 = 400,289.18/x - Step 3: Cross multiply
686,775.24x = 947,809.76 × 400,289.18 - Step 4: Simplify right side
686,775.24x = 379,397,984,885.90 - Step 5: Solve for x
x = 379,397,984,885.90/686,775.24 - Step 6: Final answer
x = 552,433.99
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1.5x scale
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.