Finding the Fourth Proportional to 391,055.20, 539,656.18 and 212,207.20
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Solution
The fourth proportional to 391,055.20, 539,656.18 and 212,207.20 is: 292,845.94
Step by Step Solution
- Step 1: Write the proportion equation
391,055.20 : 539,656.18 = 212,207.20 : x - Step 2: Convert to fraction form
391,055.20/539,656.18 = 212,207.20/x - Step 3: Cross multiply
391,055.20x = 539,656.18 × 212,207.20 - Step 4: Simplify right side
391,055.20x = 114,518,928,673.24 - Step 5: Solve for x
x = 114,518,928,673.24/391,055.20 - Step 6: Final answer
x = 292,845.94
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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.