Home / 769,311.09-1,061,652.53-420,458.51

Finding the Fourth Proportional to 769,311.09, 1,061,652.53 and 420,458.51

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Solution

The fourth proportional to 769,311.09, 1,061,652.53 and 420,458.51 is: 580,234.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,311.09 : 1,061,652.53 = 420,458.51 : x
  2. Step 2: Convert to fraction form
    769,311.09/1,061,652.53 = 420,458.51/x
  3. Step 3: Cross multiply
    769,311.09x = 1,061,652.53 × 420,458.51
  4. Step 4: Simplify right side
    769,311.09x = 446,380,844,606.81
  5. Step 5: Solve for x
    x = 446,380,844,606.81/769,311.09
  6. Step 6: Final answer
    x = 580,234.51

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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.