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Finding the Fourth Proportional to 391,231.53, 539,708.76 and 255,203.73

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Solution

The fourth proportional to 391,231.53, 539,708.76 and 255,203.73 is: 352,056.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,231.53 : 539,708.76 = 255,203.73 : x
  2. Step 2: Convert to fraction form
    391,231.53/539,708.76 = 255,203.73/x
  3. Step 3: Cross multiply
    391,231.53x = 539,708.76 × 255,203.73
  4. Step 4: Simplify right side
    391,231.53x = 137,735,688,665.68
  5. Step 5: Solve for x
    x = 137,735,688,665.68/391,231.53
  6. Step 6: Final answer
    x = 352,056.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.