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Finding the Fourth Proportional to 259,550.40, 389,325.60 and 257,800.80

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Solution

The fourth proportional to 259,550.40, 389,325.60 and 257,800.80 is: 386,701.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,550.40 : 389,325.60 = 257,800.80 : x
  2. Step 2: Convert to fraction form
    259,550.40/389,325.60 = 257,800.80/x
  3. Step 3: Cross multiply
    259,550.40x = 389,325.60 × 257,800.80
  4. Step 4: Simplify right side
    259,550.40x = 100,368,451,140.48
  5. Step 5: Solve for x
    x = 100,368,451,140.48/259,550.40
  6. Step 6: Final answer
    x = 386,701.20

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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.