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Finding the Fourth Proportional to 391,471, 587,235.78 and 111,010.84

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Solution

The fourth proportional to 391,471, 587,235.78 and 111,010.84 is: 166,524.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,471 : 587,235.78 = 111,010.84 : x
  2. Step 2: Convert to fraction form
    391,471/587,235.78 = 111,010.84/x
  3. Step 3: Cross multiply
    391,471x = 587,235.78 × 111,010.84
  4. Step 4: Simplify right side
    391,471x = 65,189,537,215.86
  5. Step 5: Solve for x
    x = 65,189,537,215.86/391,471
  6. Step 6: Final answer
    x = 166,524.56

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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.