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Finding the Fourth Proportional to 1,905.53, 2,858.90 and 673.72

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Solution

The fourth proportional to 1,905.53, 2,858.90 and 673.72 is: 1,010.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.53 : 2,858.90 = 673.72 : x
  2. Step 2: Convert to fraction form
    1,905.53/2,858.90 = 673.72/x
  3. Step 3: Cross multiply
    1,905.53x = 2,858.90 × 673.72
  4. Step 4: Simplify right side
    1,905.53x = 1,926,087.59
  5. Step 5: Solve for x
    x = 1,926,087.59/1,905.53
  6. Step 6: Final answer
    x = 1,010.79

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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.