Finding the Fourth Proportional to 391,978.08, 587,964.96 and 142,660.08
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Solution
The fourth proportional to 391,978.08, 587,964.96 and 142,660.08 is: 213,989.33
Step by Step Solution
- Step 1: Write the proportion equation
391,978.08 : 587,964.96 = 142,660.08 : x - Step 2: Convert to fraction form
391,978.08/587,964.96 = 142,660.08/x - Step 3: Cross multiply
391,978.08x = 587,964.96 × 142,660.08 - Step 4: Simplify right side
391,978.08x = 83,879,128,230.80 - Step 5: Solve for x
x = 83,879,128,230.80/391,978.08 - Step 6: Final answer
x = 213,989.33
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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.