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Finding the Fourth Proportional to 391,734.42, 540,394.56 and 255,847.92

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Solution

The fourth proportional to 391,734.42, 540,394.56 and 255,847.92 is: 352,940.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,734.42 : 540,394.56 = 255,847.92 : x
  2. Step 2: Convert to fraction form
    391,734.42/540,394.56 = 255,847.92/x
  3. Step 3: Cross multiply
    391,734.42x = 540,394.56 × 255,847.92
  4. Step 4: Simplify right side
    391,734.42x = 138,258,824,155.32
  5. Step 5: Solve for x
    x = 138,258,824,155.32/391,734.42
  6. Step 6: Final answer
    x = 352,940.20

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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.