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Finding the Fourth Proportional to 391,728.96, 587,580.48 and 170,112.96

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Solution

The fourth proportional to 391,728.96, 587,580.48 and 170,112.96 is: 255,163.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,728.96 : 587,580.48 = 170,112.96 : x
  2. Step 2: Convert to fraction form
    391,728.96/587,580.48 = 170,112.96/x
  3. Step 3: Cross multiply
    391,728.96x = 587,580.48 × 170,112.96
  4. Step 4: Simplify right side
    391,728.96x = 99,955,054,691.02
  5. Step 5: Solve for x
    x = 99,955,054,691.02/391,728.96
  6. Step 6: Final answer
    x = 255,163.81

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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.