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Finding the Fourth Proportional to 979,899.20, 1,469,848.80 and 839,931.20

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Solution

The fourth proportional to 979,899.20, 1,469,848.80 and 839,931.20 is: 1,259,896.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    979,899.20 : 1,469,848.80 = 839,931.20 : x
  2. Step 2: Convert to fraction form
    979,899.20/1,469,848.80 = 839,931.20/x
  3. Step 3: Cross multiply
    979,899.20x = 1,469,848.80 × 839,931.20
  4. Step 4: Simplify right side
    979,899.20x = 1,234,571,866,402.56
  5. Step 5: Solve for x
    x = 1,234,571,866,402.56/979,899.20
  6. Step 6: Final answer
    x = 1,259,896.80

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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.