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Finding the Fourth Proportional to 392,004.32, 587,865.29 and 135,767.51

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Solution

The fourth proportional to 392,004.32, 587,865.29 and 135,767.51 is: 203,602.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,004.32 : 587,865.29 = 135,767.51 : x
  2. Step 2: Convert to fraction form
    392,004.32/587,865.29 = 135,767.51/x
  3. Step 3: Cross multiply
    392,004.32x = 587,865.29 × 135,767.51
  4. Step 4: Simplify right side
    392,004.32x = 79,813,003,020.56
  5. Step 5: Solve for x
    x = 79,813,003,020.56/392,004.32
  6. Step 6: Final answer
    x = 203,602.36

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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.