Home / 820,429.96-1,230,789.45-280,559.32

Finding the Fourth Proportional to 820,429.96, 1,230,789.45 and 280,559.32

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Solution

The fourth proportional to 820,429.96, 1,230,789.45 and 280,559.32 is: 420,888.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,429.96 : 1,230,789.45 = 280,559.32 : x
  2. Step 2: Convert to fraction form
    820,429.96/1,230,789.45 = 280,559.32/x
  3. Step 3: Cross multiply
    820,429.96x = 1,230,789.45 × 280,559.32
  4. Step 4: Simplify right side
    820,429.96x = 345,309,451,155.17
  5. Step 5: Solve for x
    x = 345,309,451,155.17/820,429.96
  6. Step 6: Final answer
    x = 420,888.40

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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.