Finding the Fourth Proportional to 709,920.08, 979,691.76 and 387,632.96
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Solution
The fourth proportional to 709,920.08, 979,691.76 and 387,632.96 is: 534,934.60
Step by Step Solution
- Step 1: Write the proportion equation
709,920.08 : 979,691.76 = 387,632.96 : x - Step 2: Convert to fraction form
709,920.08/979,691.76 = 387,632.96/x - Step 3: Cross multiply
709,920.08x = 979,691.76 × 387,632.96 - Step 4: Simplify right side
709,920.08x = 379,760,816,816.41 - Step 5: Solve for x
x = 379,760,816,816.41/709,920.08 - Step 6: Final answer
x = 534,934.60
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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.