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Finding the Fourth Proportional to 485,738.60, 728,659.72 and 130,757.72

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Solution

The fourth proportional to 485,738.60, 728,659.72 and 130,757.72 is: 196,150.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,738.60 : 728,659.72 = 130,757.72 : x
  2. Step 2: Convert to fraction form
    485,738.60/728,659.72 = 130,757.72/x
  3. Step 3: Cross multiply
    485,738.60x = 728,659.72 × 130,757.72
  4. Step 4: Simplify right side
    485,738.60x = 95,277,883,643.04
  5. Step 5: Solve for x
    x = 95,277,883,643.04/485,738.60
  6. Step 6: Final answer
    x = 196,150.53

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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.