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Finding the Fourth Proportional to 260,870.40, 391,305.60 and 83,383.20

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Solution

The fourth proportional to 260,870.40, 391,305.60 and 83,383.20 is: 125,074.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,870.40 : 391,305.60 = 83,383.20 : x
  2. Step 2: Convert to fraction form
    260,870.40/391,305.60 = 83,383.20/x
  3. Step 3: Cross multiply
    260,870.40x = 391,305.60 × 83,383.20
  4. Step 4: Simplify right side
    260,870.40x = 32,628,313,105.92
  5. Step 5: Solve for x
    x = 32,628,313,105.92/260,870.40
  6. Step 6: Final answer
    x = 125,074.80

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1.5x scale

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.