Finding the Fourth Proportional to 646,286.58, 891,745.20 and 391,489.74
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Solution
The fourth proportional to 646,286.58, 891,745.20 and 391,489.74 is: 540,176.92
Step by Step Solution
- Step 1: Write the proportion equation
646,286.58 : 891,745.20 = 391,489.74 : x - Step 2: Convert to fraction form
646,286.58/891,745.20 = 391,489.74/x - Step 3: Cross multiply
646,286.58x = 891,745.20 × 391,489.74 - Step 4: Simplify right side
646,286.58x = 349,109,096,494.25 - Step 5: Solve for x
x = 349,109,096,494.25/646,286.58 - Step 6: Final answer
x = 540,176.92
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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.