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Finding the Fourth Proportional to 263,320.40, 394,721.40 and 130,221.20

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Solution

The fourth proportional to 263,320.40, 394,721.40 and 130,221.20 is: 195,203.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,320.40 : 394,721.40 = 130,221.20 : x
  2. Step 2: Convert to fraction form
    263,320.40/394,721.40 = 130,221.20/x
  3. Step 3: Cross multiply
    263,320.40x = 394,721.40 × 130,221.20
  4. Step 4: Simplify right side
    263,320.40x = 51,401,094,373.68
  5. Step 5: Solve for x
    x = 51,401,094,373.68/263,320.40
  6. Step 6: Final answer
    x = 195,203.62

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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.