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Finding the Fourth Proportional to 279,455.40, 419,150.70 and 79,806.60

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Solution

The fourth proportional to 279,455.40, 419,150.70 and 79,806.60 is: 119,700.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,455.40 : 419,150.70 = 79,806.60 : x
  2. Step 2: Convert to fraction form
    279,455.40/419,150.70 = 79,806.60/x
  3. Step 3: Cross multiply
    279,455.40x = 419,150.70 × 79,806.60
  4. Step 4: Simplify right side
    279,455.40x = 33,450,992,254.62
  5. Step 5: Solve for x
    x = 33,450,992,254.62/279,455.40
  6. Step 6: Final answer
    x = 119,700.65

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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.