Home / 391,931.28-587,887.20-125,710.56

Finding the Fourth Proportional to 391,931.28, 587,887.20 and 125,710.56

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Solution

The fourth proportional to 391,931.28, 587,887.20 and 125,710.56 is: 188,562.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,931.28 : 587,887.20 = 125,710.56 : x
  2. Step 2: Convert to fraction form
    391,931.28/587,887.20 = 125,710.56/x
  3. Step 3: Cross multiply
    391,931.28x = 587,887.20 × 125,710.56
  4. Step 4: Simplify right side
    391,931.28x = 73,903,629,128.83
  5. Step 5: Solve for x
    x = 73,903,629,128.83/391,931.28
  6. Step 6: Final answer
    x = 188,562.72

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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.