Home / 215,742.20-324,002.10-208,743.80

Finding the Fourth Proportional to 215,742.20, 324,002.10 and 208,743.80

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Solution

The fourth proportional to 215,742.20, 324,002.10 and 208,743.80 is: 313,491.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,742.20 : 324,002.10 = 208,743.80 : x
  2. Step 2: Convert to fraction form
    215,742.20/324,002.10 = 208,743.80/x
  3. Step 3: Cross multiply
    215,742.20x = 324,002.10 × 208,743.80
  4. Step 4: Simplify right side
    215,742.20x = 67,633,429,561.98
  5. Step 5: Solve for x
    x = 67,633,429,561.98/215,742.20
  6. Step 6: Final answer
    x = 313,491.89

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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.