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Finding the Fourth Proportional to 320,628.20, 480,942.30 and 83,994.80

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Solution

The fourth proportional to 320,628.20, 480,942.30 and 83,994.80 is: 125,992.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,628.20 : 480,942.30 = 83,994.80 : x
  2. Step 2: Convert to fraction form
    320,628.20/480,942.30 = 83,994.80/x
  3. Step 3: Cross multiply
    320,628.20x = 480,942.30 × 83,994.80
  4. Step 4: Simplify right side
    320,628.20x = 40,396,652,300.04
  5. Step 5: Solve for x
    x = 40,396,652,300.04/320,628.20
  6. Step 6: Final answer
    x = 125,992.20

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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.