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Finding the Fourth Proportional to 322,630.60, 483,945.90 and 86,009.80

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Solution

The fourth proportional to 322,630.60, 483,945.90 and 86,009.80 is: 129,014.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,630.60 : 483,945.90 = 86,009.80 : x
  2. Step 2: Convert to fraction form
    322,630.60/483,945.90 = 86,009.80/x
  3. Step 3: Cross multiply
    322,630.60x = 483,945.90 × 86,009.80
  4. Step 4: Simplify right side
    322,630.60x = 41,624,090,069.82
  5. Step 5: Solve for x
    x = 41,624,090,069.82/322,630.60
  6. Step 6: Final answer
    x = 129,014.70

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Similar ratio
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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.