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Finding the Fourth Proportional to 259,660.80, 389,491.20 and 243,914.40

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Solution

The fourth proportional to 259,660.80, 389,491.20 and 243,914.40 is: 365,871.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,660.80 : 389,491.20 = 243,914.40 : x
  2. Step 2: Convert to fraction form
    259,660.80/389,491.20 = 243,914.40/x
  3. Step 3: Cross multiply
    259,660.80x = 389,491.20 × 243,914.40
  4. Step 4: Simplify right side
    259,660.80x = 95,002,512,353.28
  5. Step 5: Solve for x
    x = 95,002,512,353.28/259,660.80
  6. Step 6: Final answer
    x = 365,871.60

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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.