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Finding the Fourth Proportional to 378,668.64, 568,002.78 and 112,429.02

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Solution

The fourth proportional to 378,668.64, 568,002.78 and 112,429.02 is: 168,643.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,668.64 : 568,002.78 = 112,429.02 : x
  2. Step 2: Convert to fraction form
    378,668.64/568,002.78 = 112,429.02/x
  3. Step 3: Cross multiply
    378,668.64x = 568,002.78 × 112,429.02
  4. Step 4: Simplify right side
    378,668.64x = 63,859,995,912.68
  5. Step 5: Solve for x
    x = 63,859,995,912.68/378,668.64
  6. Step 6: Final answer
    x = 168,643.48

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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.