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Finding the Fourth Proportional to 391,383.43, 540,100 and 230,248.86

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Solution

The fourth proportional to 391,383.43, 540,100 and 230,248.86 is: 317,738.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,383.43 : 540,100 = 230,248.86 : x
  2. Step 2: Convert to fraction form
    391,383.43/540,100 = 230,248.86/x
  3. Step 3: Cross multiply
    391,383.43x = 540,100 × 230,248.86
  4. Step 4: Simplify right side
    391,383.43x = 124,357,409,286
  5. Step 5: Solve for x
    x = 124,357,409,286/391,383.43
  6. Step 6: Final answer
    x = 317,738.05

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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.