Finding the Fourth Proportional to 686,139.30, 946,877.79 and 380,220.79
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Solution
The fourth proportional to 686,139.30, 946,877.79 and 380,220.79 is: 524,707.77
Step by Step Solution
- Step 1: Write the proportion equation
686,139.30 : 946,877.79 = 380,220.79 : x - Step 2: Convert to fraction form
686,139.30/946,877.79 = 380,220.79/x - Step 3: Cross multiply
686,139.30x = 946,877.79 × 380,220.79 - Step 4: Simplify right side
686,139.30x = 360,022,621,347.25 - Step 5: Solve for x
x = 360,022,621,347.25/686,139.30 - Step 6: Final answer
x = 524,707.77
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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.