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Finding the Fourth Proportional to 821,415.89, 1,230,853.82 and 641,073.71

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Solution

The fourth proportional to 821,415.89, 1,230,853.82 and 641,073.71 is: 960,619.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,415.89 : 1,230,853.82 = 641,073.71 : x
  2. Step 2: Convert to fraction form
    821,415.89/1,230,853.82 = 641,073.71/x
  3. Step 3: Cross multiply
    821,415.89x = 1,230,853.82 × 641,073.71
  4. Step 4: Simplify right side
    821,415.89x = 789,068,015,495.44
  5. Step 5: Solve for x
    x = 789,068,015,495.44/821,415.89
  6. Step 6: Final answer
    x = 960,619.38

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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.