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Finding the Fourth Proportional to 328,629.60, 493,138.80 and 239,659.20

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Solution

The fourth proportional to 328,629.60, 493,138.80 and 239,659.20 is: 359,630.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,629.60 : 493,138.80 = 239,659.20 : x
  2. Step 2: Convert to fraction form
    328,629.60/493,138.80 = 239,659.20/x
  3. Step 3: Cross multiply
    328,629.60x = 493,138.80 × 239,659.20
  4. Step 4: Simplify right side
    328,629.60x = 118,185,250,296.96
  5. Step 5: Solve for x
    x = 118,185,250,296.96/328,629.60
  6. Step 6: Final answer
    x = 359,630.57

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1.5x scale

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.