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Finding the Fourth Proportional to 259,711.80, 389,567.70 and 255,337.80

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Solution

The fourth proportional to 259,711.80, 389,567.70 and 255,337.80 is: 383,006.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,711.80 : 389,567.70 = 255,337.80 : x
  2. Step 2: Convert to fraction form
    259,711.80/389,567.70 = 255,337.80/x
  3. Step 3: Cross multiply
    259,711.80x = 389,567.70 × 255,337.80
  4. Step 4: Simplify right side
    259,711.80x = 99,471,359,469.06
  5. Step 5: Solve for x
    x = 99,471,359,469.06/259,711.80
  6. Step 6: Final answer
    x = 383,006.70

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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.