Home / 340,128.20-509,609.10-221,738.60

Finding the Fourth Proportional to 340,128.20, 509,609.10 and 221,738.60

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Solution

The fourth proportional to 340,128.20, 509,609.10 and 221,738.60 is: 332,227.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,128.20 : 509,609.10 = 221,738.60 : x
  2. Step 2: Convert to fraction form
    340,128.20/509,609.10 = 221,738.60/x
  3. Step 3: Cross multiply
    340,128.20x = 509,609.10 × 221,738.60
  4. Step 4: Simplify right side
    340,128.20x = 113,000,008,381.26
  5. Step 5: Solve for x
    x = 113,000,008,381.26/340,128.20
  6. Step 6: Final answer
    x = 332,227.70

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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.