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Finding the Fourth Proportional to 671,731.58, 1,007,919.96 and 418,947.19

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Solution

The fourth proportional to 671,731.58, 1,007,919.96 and 418,947.19 is: 628,621.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,731.58 : 1,007,919.96 = 418,947.19 : x
  2. Step 2: Convert to fraction form
    671,731.58/1,007,919.96 = 418,947.19/x
  3. Step 3: Cross multiply
    671,731.58x = 1,007,919.96 × 418,947.19
  4. Step 4: Simplify right side
    671,731.58x = 422,265,230,896.06
  5. Step 5: Solve for x
    x = 422,265,230,896.06/671,731.58
  6. Step 6: Final answer
    x = 628,621.97

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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.