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Finding the Fourth Proportional to 391,795.76, 587,700.12 and 111,302.48

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Solution

The fourth proportional to 391,795.76, 587,700.12 and 111,302.48 is: 166,955.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,795.76 : 587,700.12 = 111,302.48 : x
  2. Step 2: Convert to fraction form
    391,795.76/587,700.12 = 111,302.48/x
  3. Step 3: Cross multiply
    391,795.76x = 587,700.12 × 111,302.48
  4. Step 4: Simplify right side
    391,795.76x = 65,412,480,852.30
  5. Step 5: Solve for x
    x = 65,412,480,852.30/391,795.76
  6. Step 6: Final answer
    x = 166,955.56

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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.