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Finding the Fourth Proportional to 1,905.98, 2,859 and 673.42

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Solution

The fourth proportional to 1,905.98, 2,859 and 673.42 is: 1,010.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,905.98 : 2,859 = 673.42 : x
  2. Step 2: Convert to fraction form
    1,905.98/2,859 = 673.42/x
  3. Step 3: Cross multiply
    1,905.98x = 2,859 × 673.42
  4. Step 4: Simplify right side
    1,905.98x = 1,925,307.78
  5. Step 5: Solve for x
    x = 1,925,307.78/1,905.98
  6. Step 6: Final answer
    x = 1,010.14

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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.