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Finding the Fourth Proportional to 391,984.89, 587,921.98 and 125,710.81

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Solution

The fourth proportional to 391,984.89, 587,921.98 and 125,710.81 is: 188,548.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,984.89 : 587,921.98 = 125,710.81 : x
  2. Step 2: Convert to fraction form
    391,984.89/587,921.98 = 125,710.81/x
  3. Step 3: Cross multiply
    391,984.89x = 587,921.98 × 125,710.81
  4. Step 4: Simplify right side
    391,984.89x = 73,908,148,958.10
  5. Step 5: Solve for x
    x = 73,908,148,958.10/391,984.89
  6. Step 6: Final answer
    x = 188,548.46

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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.