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Finding the Fourth Proportional to 259,717.80, 389,576.70 and 82,238.70

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Solution

The fourth proportional to 259,717.80, 389,576.70 and 82,238.70 is: 123,358.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,717.80 : 389,576.70 = 82,238.70 : x
  2. Step 2: Convert to fraction form
    259,717.80/389,576.70 = 82,238.70/x
  3. Step 3: Cross multiply
    259,717.80x = 389,576.70 × 82,238.70
  4. Step 4: Simplify right side
    259,717.80x = 32,038,281,358.29
  5. Step 5: Solve for x
    x = 32,038,281,358.29/259,717.80
  6. Step 6: Final answer
    x = 123,358.05

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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.