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Finding the Fourth Proportional to 409,005.02, 613,540.34 and 142,759.64

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Solution

The fourth proportional to 409,005.02, 613,540.34 and 142,759.64 is: 214,150.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,005.02 : 613,540.34 = 142,759.64 : x
  2. Step 2: Convert to fraction form
    409,005.02/613,540.34 = 142,759.64/x
  3. Step 3: Cross multiply
    409,005.02x = 613,540.34 × 142,759.64
  4. Step 4: Simplify right side
    409,005.02x = 87,588,798,063.88
  5. Step 5: Solve for x
    x = 87,588,798,063.88/409,005.02
  6. Step 6: Final answer
    x = 214,150.91

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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.