Home / 769,749.75-1,062,221.24-420,883.76

Finding the Fourth Proportional to 769,749.75, 1,062,221.24 and 420,883.76

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Solution

The fourth proportional to 769,749.75, 1,062,221.24 and 420,883.76 is: 580,801.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,749.75 : 1,062,221.24 = 420,883.76 : x
  2. Step 2: Convert to fraction form
    769,749.75/1,062,221.24 = 420,883.76/x
  3. Step 3: Cross multiply
    769,749.75x = 1,062,221.24 × 420,883.76
  4. Step 4: Simplify right side
    769,749.75x = 447,071,673,150.83
  5. Step 5: Solve for x
    x = 447,071,673,150.83/769,749.75
  6. Step 6: Final answer
    x = 580,801.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.