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Finding the Fourth Proportional to 508,320.40, 762,480.60 and 279,997.60

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Solution

The fourth proportional to 508,320.40, 762,480.60 and 279,997.60 is: 419,996.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,320.40 : 762,480.60 = 279,997.60 : x
  2. Step 2: Convert to fraction form
    508,320.40/762,480.60 = 279,997.60/x
  3. Step 3: Cross multiply
    508,320.40x = 762,480.60 × 279,997.60
  4. Step 4: Simplify right side
    508,320.40x = 213,492,738,046.56
  5. Step 5: Solve for x
    x = 213,492,738,046.56/508,320.40
  6. Step 6: Final answer
    x = 419,996.40

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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.