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Finding the Fourth Proportional to 508,319.40, 762,479.10 and 279,996.60

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Solution

The fourth proportional to 508,319.40, 762,479.10 and 279,996.60 is: 419,994.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,319.40 : 762,479.10 = 279,996.60 : x
  2. Step 2: Convert to fraction form
    508,319.40/762,479.10 = 279,996.60/x
  3. Step 3: Cross multiply
    508,319.40x = 762,479.10 × 279,996.60
  4. Step 4: Simplify right side
    508,319.40x = 213,491,555,571.06
  5. Step 5: Solve for x
    x = 213,491,555,571.06/508,319.40
  6. Step 6: Final answer
    x = 419,994.90

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Double scale
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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.