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Finding the Fourth Proportional to 391,700.09, 587,550.13 and 258,549.21

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Solution

The fourth proportional to 391,700.09, 587,550.13 and 258,549.21 is: 387,823.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,700.09 : 587,550.13 = 258,549.21 : x
  2. Step 2: Convert to fraction form
    391,700.09/587,550.13 = 258,549.21/x
  3. Step 3: Cross multiply
    391,700.09x = 587,550.13 × 258,549.21
  4. Step 4: Simplify right side
    391,700.09x = 151,910,620,375.21
  5. Step 5: Solve for x
    x = 151,910,620,375.21/391,700.09
  6. Step 6: Final answer
    x = 387,823.81

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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.