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Finding the Fourth Proportional to 324,000.40, 486,000.60 and 205,805.20

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Solution

The fourth proportional to 324,000.40, 486,000.60 and 205,805.20 is: 308,707.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,000.40 : 486,000.60 = 205,805.20 : x
  2. Step 2: Convert to fraction form
    324,000.40/486,000.60 = 205,805.20/x
  3. Step 3: Cross multiply
    324,000.40x = 486,000.60 × 205,805.20
  4. Step 4: Simplify right side
    324,000.40x = 100,021,450,683.12
  5. Step 5: Solve for x
    x = 100,021,450,683.12/324,000.40
  6. Step 6: Final answer
    x = 308,707.80

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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.