Finding the Fourth Proportional to 857,920.38, 1,286,889.68 and 258,886.80
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Solution
The fourth proportional to 857,920.38, 1,286,889.68 and 258,886.80 is: 388,332.96
Step by Step Solution
- Step 1: Write the proportion equation
857,920.38 : 1,286,889.68 = 258,886.80 : x - Step 2: Convert to fraction form
857,920.38/1,286,889.68 = 258,886.80/x - Step 3: Cross multiply
857,920.38x = 1,286,889.68 × 258,886.80 - Step 4: Simplify right side
857,920.38x = 333,158,756,681.28 - Step 5: Solve for x
x = 333,158,756,681.28/857,920.38 - Step 6: Final answer
x = 388,332.96
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.