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Finding the Fourth Proportional to 259,403.60, 389,105.40 and 72,415.10

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Solution

The fourth proportional to 259,403.60, 389,105.40 and 72,415.10 is: 108,622.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,403.60 : 389,105.40 = 72,415.10 : x
  2. Step 2: Convert to fraction form
    259,403.60/389,105.40 = 72,415.10/x
  3. Step 3: Cross multiply
    259,403.60x = 389,105.40 × 72,415.10
  4. Step 4: Simplify right side
    259,403.60x = 28,177,106,451.54
  5. Step 5: Solve for x
    x = 28,177,106,451.54/259,403.60
  6. Step 6: Final answer
    x = 108,622.65

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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.