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Finding the Fourth Proportional to 320,432.60, 479,992.80 and 162,749.90

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Solution

The fourth proportional to 320,432.60, 479,992.80 and 162,749.90 is: 243,791.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,432.60 : 479,992.80 = 162,749.90 : x
  2. Step 2: Convert to fraction form
    320,432.60/479,992.80 = 162,749.90/x
  3. Step 3: Cross multiply
    320,432.60x = 479,992.80 × 162,749.90
  4. Step 4: Simplify right side
    320,432.60x = 78,118,780,200.72
  5. Step 5: Solve for x
    x = 78,118,780,200.72/320,432.60
  6. Step 6: Final answer
    x = 243,791.61

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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.