Home / 494,729.20-742,215.30-139,738.60

Finding the Fourth Proportional to 494,729.20, 742,215.30 and 139,738.60

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Solution

The fourth proportional to 494,729.20, 742,215.30 and 139,738.60 is: 209,642.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,729.20 : 742,215.30 = 139,738.60 : x
  2. Step 2: Convert to fraction form
    494,729.20/742,215.30 = 139,738.60/x
  3. Step 3: Cross multiply
    494,729.20x = 742,215.30 × 139,738.60
  4. Step 4: Simplify right side
    494,729.20x = 103,716,126,920.58
  5. Step 5: Solve for x
    x = 103,716,126,920.58/494,729.20
  6. Step 6: Final answer
    x = 209,642.22

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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.