Home / 320,421.60-479,976.30-162,738.90

Finding the Fourth Proportional to 320,421.60, 479,976.30 and 162,738.90

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Solution

The fourth proportional to 320,421.60, 479,976.30 and 162,738.90 is: 243,775.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,421.60 : 479,976.30 = 162,738.90 : x
  2. Step 2: Convert to fraction form
    320,421.60/479,976.30 = 162,738.90/x
  3. Step 3: Cross multiply
    320,421.60x = 479,976.30 × 162,738.90
  4. Step 4: Simplify right side
    320,421.60x = 78,110,815,088.07
  5. Step 5: Solve for x
    x = 78,110,815,088.07/320,421.60
  6. Step 6: Final answer
    x = 243,775.12

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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.