Finding the Fourth Proportional to 391,405.80, 587,108.70 and 251,437.80
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Solution
The fourth proportional to 391,405.80, 587,108.70 and 251,437.80 is: 377,156.70
Step by Step Solution
- Step 1: Write the proportion equation
391,405.80 : 587,108.70 = 251,437.80 : x - Step 2: Convert to fraction form
391,405.80/587,108.70 = 251,437.80/x - Step 3: Cross multiply
391,405.80x = 587,108.70 × 251,437.80 - Step 4: Simplify right side
391,405.80x = 147,621,319,888.86 - Step 5: Solve for x
x = 147,621,319,888.86/391,405.80 - Step 6: Final answer
x = 377,156.70
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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.